Quote Originally Posted by keith_r
"NitrAte is relaatively non-toxic to tilapia;however, prolonged exposure to eleveated levels of nitrate may decrease the immune response and induce mortality (Plumb, 1997)

how's that for a reference...
It's excellent. Thank you. One thing to point out is it states "Nitrate is relatively non-toxic to tilapia"

I'm still not seeing a case for nitrate toxicity in tilapia, let alone any fish. Ironically, I stated this exact source above:

Tilapia: biology, culture, and nutrition By Chhorn Lim, Carl D. Webster
The above line of text is out of this book, I believe. Yes?