Thanks for the inputs Cecil! I think I will go with a combination of your 1 and 3 options for nitrate removal. What level of nitrate would you consider to be a problem?
Honestly don't know but there is literature out there. JKB?
I've had my color up there in the rich red (top of scale) for nitrates with my API Master test kit and had no issues with bluegill, tilapia, smallmouth bass, or yellow perch.
Trout in a coldwater RAS, according to some research I read, is a different story. Apparently they have issues with nitrates and do funky stuff like swimming sideways, deformaties etc.
Apparently the way to counteract a build up of nitrates in coldwater RAS is to do partial RAS. That is, a continual flow of cold fresh ground water to dilute nitrates and keep temps down and stabilize Ph. Not enough to be complete flow through like a trout raceway system but more than a typical RAS.
Last edited by Cecil Baird1; 01/09/1612:19 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
