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collonista snail
Ok, so at what point do you consider these colonista snails a bad thing, like plague proportions? I have hundreds of them all over everything in my tank when lights go down. They don't seem to be helping my algae problem at all, and in fact are now leaving green spots on my glass where they were. Attaching pix. Please excuse my dirty tank and the flakes flying around. I forgot to feed earlier and turned lights on to toss in some flakes.I would say yes a wrasse would eat them. The snails are in fact good though. Hell, I have millions, ok maybe thousands, seriously. Their population comes and goes depending on my maintenance habits; removing their food sources. In my experience they pose no threat other than visual.