Originally Posted by dj2005
I see. It's just that I have never seen someone recommend so many, even people like msjinkzd states one per five gallons.
I suppose it would depend on the amount of algae present, however.
The descrepancy is probably that I'm used to dealing with Olive nerites, which are either a smaller species or simply sold that way. I've kept other kinds, and for complete algae control, I'm still not sure 1 per 5g would be enough. Maybe if you also have otos or something in there.