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How the FishPlant system works

The PlantBed of the FishPlant system is based on the ‘Flood & Drain’ (or ‘Ebb & Flow’) hydroponic technique – the ‘Flood’ bringing water and nutrients to the plants roots, the ‘Drain’ drawing fresh air (oxygen) into the root-zone.

The water pump runs constantly and the AutoSiphon controls the flooding and draining. The AutoSiphon cycle starts when the water level in the PlantBed passes the overflow point of the Downspout and starts to siphon back into the FishTank – this also helps oxygenate the water for the fish. The siphon will flow faster than the inlet flow rate and will drain the PlantBed until the water level reaches the siphon break point. Then it will start flooding again (see diagram).

Do I Need Extra Water Circulation?

The Flow Fitting also directs some of the pumped water directly back into your FishTank which ensures constant circulation and helps oxygenate the water for the fish. If you add beds or nursery tanks to your system, at a later date, a second circulation pump may be required then.

Do I Need Extra Aeration?

High oxygen levels in the water are important for healthy fish so you may wish to consider a FishPlant Air-pump and FishPlant Air-stone for your System. We strongly recommend this for heated systems as warm water naturally holds less oxygen.

Do I Need A Heater?

This depends on the fish species you plan to keep and the environment your system is in, for Tilapia you will certainly need one (require 24-32°C), such as the FishPlant 300w Heater. 'Sourcing your fish' has tables which show ideal temperature ranges for a number of fish species.