Hey all so im not exacly sure the exact smell but it smells kinda like a dead fish. went to the fish store they told me di resin sometimes smells like that. But my freshwater barrel smells like nothing. Also the barrel only smells like it when the pump is running. I've tested the water theres only a nitrate of 2 in the barrel everything else is 0. is it the pump going bad or what could it be? Its a 7 stage rodi setup just btw.


