when I got my 10g tank, this was all that was in it (free from my sister - so I blame her for getting me hooked!). later that day, I went and got my channel and 1 shark. got a pictus the next day, which died after a week. its whiskers got tangled in some underwater grass and wasn't found until the morning. I replaced that with the 2 other sharks, and within a month was up to my 30g tank, to which I just added 3 angels.