ok, my sucking loach is so lazy, I have algae cos of the amount of sun in the room and the no matter how little I feed them they just don't seem to eat! the loach doesn't seem to touch the algae, so give him half an algae wafer every few days which he hardly touches, which just fuels the excess food=algae prob. tank on restricted lighting too. what I need is an efficient clean up crew to help get the tank back in shape! now I love bristlenoses, but I don't think one would be happy in a 15gal (15 gal too small for a bn? - if anyone thinks a bn would be ok in there let me know), and I think a sucking loach would perhaps attach to it and harm it? what do you think? so I thought of otos as they seem a popular choice. now, decisions i'm no good at....so, if I get one will it be compatible with the sucking loach? do I get just one cos it seems from what i've read they like company, so how many do I get? i'm close to capacity and can't move any fish out of there really, but can do more/bigger water changes if required if I go slightly over the capacity to keep the levels in check and the fish happy.