JASONinNM
Aquarium Advice Activist
See and that's what I was thinking... so when I read that I looked in my refugium and there IS a very few VERY smell snails!! They are really really small snails they HAVE to be getting in through the overflow?
mr_X said:when you see big snails in the sump, just grab them and toss them back in the DT.
i think you mean drain plumbing, not return plumbing. how could they get through the return pump impeller?