5 Water Treatment Options For Every Step Of The Fish Farming Process

Land that isn't suitable for growing vegetables or fruit trees can still produce food through the magic of fish farming, either in sealed concrete ponds or above ground tanks. However, this means you need multiple water treatment methods for managing the water that both goes in and comes out of the system. Try at least two or three of these water treatment options to keep your fish farm producing at full volume.

Trapping Solid Waste

Aside from the waste coming out of the fish, you end up with quite a bit of uneaten feed if you supplement the natural supply of nutrients with pellets or crumbles. Letting the waste sit in the tanks or ponds contributes to bacterial growth and also reduces the water volume of the container over time. Swirl pumps separate settled solid waste out of the tank to keep it clean as you flush the used water out and replace it with a fresh or freshly treated supply.

The heavy solid waste sludge at the bottom isn't the only waste to worry about. You also need to get the lighter particles of food and waste that float suspended in the water. Large rotating drum or disc filters work best for this job because a larger volume of water is pushed through the filtration material.

Killing Disease

You need to kill off any unseen and hard-to-detect bacteria and disease agents in the incoming fresh water supply, in addition to adjusting the pH and checking for obvious chemical contamination. UV sterilization handles those two problems along with parasites for water you can put straight into the tanks. UV water treatment also offers benefits to the fish farmer that include the following:

  • Disinfection with no chemical residues to effect fish or changes to the pH level
  • Breakdown of algae particles entering with fresh water so your tanks don't end up clogged with green slime
  • Reduction of spending on water treatment supplies like disinfection chemicals.

Managing Nitrogen

Aside from the solid waste produced by your rainbow trout or tilapia stock, the fish secrete a lot of nitrogen that lowers water quality too. This element breaks down best through bio-filtration, a process that only involves aerobic bacteria. These bacteria need a surface to live on, such as the tank walls or a charcoal bio-filter, and plenty of oxygen mixed into the water to keep them breaking down the nitrogen. You can also install filter components that flush the system with extra bacteria during periods of unusually high nitrogen release.

Cleaning Waste Water

Even if you reuse your water supply between the ponds by filtering and treating it, you eventually need to release some waste water into the wild. Unless you have crop fields where you can safely and legally discharge the liquid, you need a few filters for solid and dissolved waste, then a UV light or chemical treatment chamber to kill off any bacteria or pests coming from your fish. This kind of treatment is especially important when the water was only used once and flows back into a natural creek, river, or lake.

Adding Oxygen

Fish might filter water through their gills to breathe, but they still absorb oxygen like we do in the process. A lack of dissolved oxygen in the water is deadly to fish, and there are hundreds of reasons the oxygen level in a tank or pond might suddenly drop. Consider installing an aerator or gas exchanger as part of your incoming water treatment equipment to ensure the fish can breathe and to encourage the nitrogen eating bacteria to thrive for healthier water.

By combining the power of nature and technology, you can build a self sustaining fish farm that produces a maximum number of edible units with minimal cost. Focus on the most valuable types of water treatment for your farm to get better results while investing less money in supplies and infrastructure. For more information, see a website like http://valleypumpnw.com.