Quote Originally Posted by Apollo
"You can always dump some of the water onto an outdoor garden or other non-aquaponic plants to help with the use of the discarded water, but only if your nitrates are too high"

So what is considered too high?
Good question. It really depends on the fish you are raising. With Tilapia, my guess is that if you stay below 100 ppm then you are probably safe. As you push up above 150 ppm we have found that you start to kill fish. Again, we really don't know what that high number is due to the inaccuracy of the test kit. That is why we started doing the dilution test in order to get a more accurate Nitrate measurement when we have a high Nitrate count.

Oliver