Quote:
Originally Posted by mellow  ^
Oxygenation:The wife and I ran an experiment with 2 small RAS's wich used Trickle towers, and although they were about 20% in size of all the combined tanks in the unit, extra oxygenation was still needed, or the fish were gulping air on the surface. We ran stocked at 60 to 70%. The outlet pipe from the Bio to the tanks also had pipes going up, to alow air into and out of the delivery line. All Aquaculture operations I have read about or seen, employ added oxygenation. I am however looking for a way not too.
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yes, your tilapia may need oxygen, but there are far better ways to provide it than with airstones. since you are recirculating anyway, i should think you could add oxygen for free, as you have done with your venturi system, or by allowing the inlet to fall and splash the surface. a spray from the pump into the tower instead of a flow, a paddlewheel powered off the incoming water ,etc will also help. using a supercharger and an airstone is just plain stupidity.