What is this?

[Nano]

Originally Posted by toytech

I have some of these guys and they just popped up out on no where , hadent added anything to the tank at all for almost 4 months.they do a great job to bad most places dont actualy sell them.

yeah, but they reproduce pretty quickly, mine spawned a few weeks ago I wasn't sure at first but yup thats what it was, theres smaller ones in there now too!