Ways to Consider Water in Your Permaculture Garden Design

 

Permaculture water features can both serve important functions and enhance the visual appeal and amenity of a space.

In a permaculture garden, water is always an important element to consider: You need to think carefully about water in all permaculture designs.As a permaculture designer, I know managing water effectively in a garden can be about more than just best ecological practices. Permaculture water features can both serve important functions and enhance the visual appeal and amenity of a space.Below are a few examples of permaculture water features from three of my recent projects. These ideas spotlight how permaculture designs can be beautiful as well as useful and can help you think about how you can include water in your garden designs.

 

Permaculture Ponds and Wetland Chain

This larger water feature was a key component of the design, and will greatly enrich both the visual appeal and biodiversity of the farm site.

 

A Gravity-Fed Waterfall and Canal Irrigation Feature

I also recently worked on an artist’s garden in Scotland. The artist in question wished to create a dramatic water feature of some kind, to create an attractive vista. She also wanted to make her garden not only a beautiful space but also one which was as productive as possible. The garden was largely level but had a steep slope at the northern end of the space. We decided to create a pond near the highest point in the garden, collecting water from the slopes above, and feed water naturally down from here via a rocky waterfall feature to a canal, feeding a second pond, and irrigation for a polyculture flower and vegetable garden. The whole permaculture water feature was designed to be visually appealing, while also managing water flow effectively to make the most of the natural rainfall and retain as much water on the site as possible.

Ponds With Chinampas and Aquaponics Integration

 

Ponds cannot just be visually appealing and biodiverse features to add to a garden. The ponds themselves can also be food-producing features. I have designed ponds that have chinampas (rafts of vegetative matter) build in/ on them in which produce can be grown. Of course, many other edible pond plants can be integrated into and around the edges of the pond, including a number of aquatic plants and marginals.

Another excellent idea and common permaculture element involve integrating a pond into an aquaponics system. The pond contains fish, which fertilize the water. And this water can then be pumped around a hydroponic growing system in a range of different ways.

One interesting idea is to place a pond partially inside and partially outside a polytunnel or other undercover growing area. The diverse habitats which can be created can increase diversity and open up a range of other interesting options for integration.

Adding a body of water inside a polytunnel or greenhouse structure can aid in temperature regulation through adding thermal mass, which can bring an increased range of possibilities when it comes to what you can successfully grow inside. The higher temperatures in an undercover growing area can also potentially allow you to rear different fish in cooler temperate climate zones, so this is something else to consider.

These are just a few ideas from my own design work, and there are plenty of other interesting and intriguing options to consider when it comes to managing and using water in your garden. The key thing is to think about the best options for your particular site. Each site is different and comes with its own unique range of challenges and opportunities. Always design for the terrain and the climate and the characteristics of your area.

I hope that these ideas will serve as an inspiration and help you think big and outside the box when it comes to adding water features in your own permaculture garden.

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Top 10 tips for shrimp farming – The basics.

 

Shrimp farming isn’t easy – but getting the basics right can keep your ponds productive and disease-free.

1. Sterilise Everything

Sterilisation is an important step to provide a disease-free environment for the shrimp. Before stocking begins, it is important to sterilise all aspects of the farm – the pond itself, all the equipment and the culture water – to make sure that pathogens are eradicated and the risk of disease minimised. Here’s how to start:

– Pond and equipment sterilisation

First, clean the pond and equipment with high pressure spray containing disinfectants. It is recommended to use 10 ppm of trichloroisocyanuric acid (TCCA) and 30 ppm of sodium hypochlorite. See below for the recommended exposure time and concentrations for chlorine disinfection.

After disinfection, scrub the pond lining to make sure that the biofilm is lifted. Then, remove all the leftover sludge from the previous cycle as this is a source of pathogens and harmful components. If the farm suffered from disease outbreak in the previous cycle, use lime with a pH up to 11 to eradicate spores and prevent further outbreaks in the next cycle

– Water sterilisation

Water sterilisation requires two steps: prefiltration and disinfection. For prefiltration, use filters with a mesh of less than 200-300 microns at the water inlet to prevent entry of pathogens, predators and undesirable settleable solids. The filters should be maintained regularly by rinsing them with clean water and removing any deposits.

As for water disinfection, use chemical disinfectants to eradicate all the pathogens. Apply 20–30 ppm of sodium hypochlorite 60 percent, 0.5–2.5 ppm of KMnO4 and 10 ppm of TCCA to the filtered water for 24 hours. Maintain full aeration during chemical disinfection. To remove the leftover chlorine, use the right amount of sodium thiosulphate by multiplying the leftover chlorine concentration by three. Finally, apply it two to seven times over 24 hours.

2. Improve your biosecurity

In shrimp farming, biosecurity is often disregarded as a mere addition of unnecessary infrastructure and complex procedures with unclear monetary benefit. However, the importance of biosecurity cannot be overstated since it is one of the key ways to prevent disease in a farm and also further outbreaks in the region; it benefits not only one farmer but also the whole neighbourhood. Biosecurity works by preventing pathogen entry and excluding pathogens from the farm. Here are some of the simplest biosecurity measures you can start to implement at your farm.

:: Protect the farm with fences – to prevent wild animals, such as crabs, which may carry undesirable pathogens, from entering.

:: Control the movement of people and vehicles – it is important to make sure that all employees and visitors go through disinfection and cleaning procedures before and after entering and working. All vehicles should go through the same procedures before entry and exit.

:: Place feed and probiotics in a specific storage room – to maintain cleanliness, prevent contact with outside vectors which may carry disease, and to provide a more stable temperature for better feed maintenance.

:: Make sure there are labs available in the area – labs are important for two essential things: assessing water quality and checking for diseases. Having a reliable lab in your area is highly beneficial, as doing these checks locally is much quicker than, for example, sending your water or shrimp sample to another city.

3. Maintain optimum alkalinity level.

Alkalinity is one of the most critical water quality parameters since it directly affects pH fluctuation and bacterial composition. It is recommended to maintain alkalinity at 120–150 ppm. Maintenance of alkalinity can be done by applying bicarbonate or carbonate compounds, such as NaHCO3, KHCO3, Na2CO3, CaCO3, and CaMg(CO3)2. It is better to apply treatment periodically rather than when alkalinity spikes occur. To maximise alkalinity increase, the amount applied at each treatment time should not be more than 20 ppm. To know the right amount of bicarbonate compounds to be applied, you need to know the current alkalinity concentration, which is why periodic measurement is important. This simple formula might help: (target alkalinity – current alkalinity concentrations)*2 Alkalinity treatment is recommended to be done at night or early morning. Bicarbonate compounds will react with carbon dioxide (CO2) which are more available at night due to respiration of all organisms.

4. Calibrate all your measurement tools

It might seem simple but before every cycle make sure that all your measurement tools are calibrated. This includes your dissolved oxygen (DO) meter, pH meter, refractometer and chemical test kit. Uncalibrated tools might cause a significant error which may lead to grave mismanagement due to inaccurate data. Calibrated tools may help you gain more accurate data on the conditions of the farm and allow them to make more educated decisions.

5. Assess post-larvae (PL) and shrimp health

Before stocking, PL from hatcheries should be checked regularly – by sight or, even better, by microscope. Shrimp health should also be assessed once a week after stocking. This is beneficial for maintaining optimal shrimp growth and detecting possible signs of disease. The key things to check are if:

:: The shrimp are swimming actively
:: Their morphology is normal
:: Their guts are full
:: They have no adhering organisms
::  There is no cloudiness in the muscle
::  The muscle to gut width ratio is 3:1
::  The hepatopancreases are large and dark
::  The gill is white or greyish
::  There is no melanisation (shown by black to brownish spots)
::  There is no moulting residue on the shrimp heads
::  There are no cuts or twists on their bodies

6. Take shrimp samples regularly

 

Sampling allows farmers to understand shrimp growth and adjust the feed regime, preventing overfeeding and underfeeding. It is recommended to take shrimp samples every five to seven days using nets appropriate to the current shrimp size. Sampling is done to estimate the mean body weight (MBW), which is calculated by dividing the total weight by the number of shrimp.
What is also important to note is how to take the samples, which should be done representatively. Avoid sampling near the feed trays because the shrimp there tend to be bigger than the rest. Take random samples vertically – covering the top, middle and bottom of the water column – as well as horizontally, covering various sides of the pond. Avoid sampling when the shrimp are moulting.
7. Use the baby bucket method for sampling
The total number of PL obtained from the hatchery is usually ascertained by counting a sample of the PL bags. After stocking, farmers usually do not take follow-up samples, but it is very important to know the survival rate 24 hours post-stocking. It may give us a clearer picture of the shrimp population after they have undergone a stress-inducing process and acclimatisation.
We are experimenting with the baby bucket method for estimating the survival rate. The baby bucket is a little bucket with holes on the side covered with mesh. To take a sample, fill the baby bucket with 100 PL and leave it on the surface of the pond for 24 hours. After 24 hours, the PL can be counted to estimate the initial data on population and survival rate. The data is crucial because it can be used to adjust the right feeding regime to avoid overfeeding or underfeeding.

8. Be aware of moulting

Moulting allows shrimp to grow bigger and is a moment in the shrimp grow-out period that needs particular attention. We need to know the moulting phase the shrimp is in by taking regular samples, this way we can better prepare when moulting happens. It is better to prepare the right environment by providing enough micro and macro nutrients to help the shrimp undergo the formation of the new exoskeleton. This may help prevent moulting problems and mortalities due to failed moults. Some of the beneficial minerals to help shrimp during moulting are: Ca, Cu, Mg, Na, P, K, Se, and Zn.

9. Apply probiotics at the right time

Probiotics are good bacteria which may boost shrimp growth, prevent stress and disease, as well as maintain good water quality. Probiotics are better applied at the beginning of the cycle, helping the juvenile shrimp acclimate to the new environment and enhance water quality. It is also recommended to apply probiotics during stressful situations for shrimp, such as water exchange and partial harvest. The good bacteria work by enhancing the shrimp gut health and maintaining a relatively good environment, both of which decrease the stress level.

 

10. Implement a nursery phase

Shrimp farmers usually stock PL from hatcheries directly to the grow-out ponds but this is risky because PLs have a relatively underdeveloped immune system. While it requires investment in infrastructure, a nursery phase helps reduce that risk by making sure that the immune systems of the PLs are enhanced before the grow-out period.
To achieve this, PL from hatcheries should be stocked in relatively small nursery ponds or tanks, with a density of more than 2000 PL/m2, for 30 days. The small size of the ponds/tanks, means that fewer probiotics are needed and these will be more effective compared to in bigger grow-out ponds, thus reducing mortalities and costs.

Conclusion – implementing the basics

We understand that each farm has specific needs and challenges. However, breaking it down to the basics, these tips are applicable to various farmers across different circumstances. We hope that these 10 simple tips can help shrimp farmers implement better management regimes for their farms.

HDRPE 30

Is the modern fiber, stronger, durable, lightest, resistant and certified​

We are increasingly aware of the importance of water when it comes to ensuring proper management, from its capture to its storage. The main problem derived from water treatment is due to problems with filtration. In the case of landfills, the leachates that are generated (industrial waste, slurry, etc.) can contaminate the groundwater, hence the importance of adequately waterproofing the slope

To ensure a correct waterproofing of the slope, the recommended material is HDRPE geomembrane for different reasons such as health, mechanical and chemical resistance, comfort and reliability during installation and its cost is affordable. It is a high-density reinforce polyethylene sheet of HDRPE focused on waterproofing reservoirs and landfills.

Why choose HDRPE?

* It is NSF Certified for drinking water & for all aqua uses from tilapia, salmon or trout growing to entertainment ponds, Koi Fish, cascades, water falls or rain reservoir.​

* It is UV protected, safe for fish, NSF certified for drinking water and very easy to use

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* 40-year durability, over 810 pounds per square inch of force​

Benefits​

* HDRPE has 5-10-15-20-30-40 years manufacturer limited guaranty.

* Maximum per inch resistance.

* It does not require underlay for most uses.

* Best UV protection.

* It is very user friendly.

* Does not contract or expand notably with heat and cold.

* It is fish safe for food production.

* It can be fixed during the life of the liner

Green water in your garden pond?

With the arrival of spring, those of you with water features
are getting them ready.

Summer is the most challenging time of year for pond and water feature enthusiasts
Keeping pond water clear and clean in 90-degree heat with 16 hours of sunlight takes some advance preparation. This is because water temperature is the key to controlling pond algae.
There are many tricks for keeping pond water cool, and you should use as many as you can.
One way is with water plants. Experienced water gardeners store stock up on annual pond plants early in the year; “floaters” like water lettuce and water hyacinth.

These plants multiply rapidly on the pond surface, forming a living “umbrella” that casts shade on the water. Perennial water lilies are also very helpful in keeping sun from warming pond water.
By August, vegetation should cover most of your pond’s surface.
Ponds in direct sun all day are the hardest to manage. You can use plantings along pond banks, particularly on the southwest side, to shade the water during the hottest part of the day.
Overhanging shrubs and ornamental grasses work well, and so do trees. There are lots of perennials that thrive along pond banks or in shallow water. These plants are called “aquatic marginals,” and many of them are perennials that will come back each year.

In addition to making a natural appearance, they help create a balanced environment around ponds that helps control algae.
Keeping water rapidly moving is another important aspect to controlling “green water” in your pond. Waterfalls and fountains mix in fresh oxygen to keep water from becoming stagnant. Rapidly moving water prevents “hot spots”, mixing cool subsurface water constantly.

To prevent “hot spots”, water should circulate completely from one end of the pond to the other, twice each hour. Make sure your pump is sized large enough. A 1000-gallon pond should have at least a 2000 gallon-per-hour pump (or larger if the pump “lifts” water up a hill or to a waterfall).
Well-designed water features are lined completely with rock. Black plastic pond liners have only one-third the surface area necessary for algae-eating bacteria to colonize. Black liners soak up the sun’s rays, acting as solar water heaters. Hiding the liner with rock reduces solar heating.
Rocks and pebbles equalize the night and day temperatures, cooling the water by day and warming it at night. Gaps between stones give fish a place to hide from predators, and act as natural filters by harboring beneficial bacteria.

A healthy living pond environment provides enough food for goldfish and snails, who help keep the pond clean. Fish wastes, in turn, help feed pond plants.
Overfeeding of fish is a major cause of algae bloom in water features. We stock our pond with bait goldfish, and never add fish food of any kind.

The fish thrive by eating mosquito and frog eggs, tadpoles, algae and insects, scrubbing the pond naturally.
Every water feature has “issues” with string algae, particularly during the summer months. We recommend fish-safe, plant-safe algae control products like AlgaeFix and barley straw, and use them in our own pond, but they are only one ingredient in a successful “recipe” for clean, clear water.
The key to clear water is a healthy balance of good design, water circulation, plants and fish.
These elements create a healthy environment similar to natural stream beds, where plants, insects and animals live in harmony in clean, clear water.

All you need to know about buying and keeping pond fish

Summer is an ideal season for buying fish for your garden water feature. Here’s your guide to choosing and caring for them.

New ponds need two-three weeks for the biology to mature and settle. Don’t be in a rush to stock the pond.
Pond filters have a media that helps the ecology and pH balance of the water. This can benefit from both time and the addition of commercial bacteria (bought as a gel).
Summer is an ideal season for buying in fish. In winter, fish kept inside can go into shock if dumped into a cold pond below 15C in temperature.
Float the bags containing your new fish on the water’s surface for at least half an hour to acclimatise them to the temperature. Opening the bag, drift in a little pond water over the next half hour, before releasing the fish gently and quietly/
Ratios vary by species, but for goldfish, the most popular and un-fussed pond fish – five fish will require in the area of 1,000l of water. If your non-native fish outgrow the pond, gift or sell them — don’t drop them in an Irish river!
Every fish pond needs filtering and even then you should test the water periodically to ensure the nitrate and potassium levels and general hardness (GH) are all healthy.
Together with koi, goldfish, black moor and shubunkins, you can keep native Irish freshwater fish in your pond including rudd, tench and carp (goldfish are actually a coloured type of carp).
Depending on the species, some fish types can grow exceptionally large and be predate other smaller fish. Get advice from your fish supplier for safe introductions.
There are various ways to keep herons, cats, mink and other predators out of your pond, ranging from jets of water set off by sensors, to nets and electric fencing (which looks pretty awful).
Surface feeding fish will be most vulnerable. The Heron Stop Reflector is a ball with a beady eye that sits on the water, terrifying herons.