I had a horrible time with these little monsters, being relatively new to fishkeeping i relied on the knowledge of my local petshop who assured me they would be fine in my community tank, needlesly to say it was like a child in a sweetie shop and munched it's way through a few of my fish and injured my large clown loach who subsequently died. So beware before considering these little blighters !!!
was just thinking about getting one for my small tank as i have two blackmoors but after reading your msg i might have to look a lil further into it . thank you so there not passive