You could add a red tailed black shark but, as already mentioned, that'll limit what other fish you can keep and it *may* be aggressive towards your guppies because of the long fins and your loaches or pleco because they share the same water level and RTBS are territorial. You may be better off with something similar but less aggressive - flying foxes are my personal favourite and they'll eat algae too 
However, they are also intolerant of their own species and sometimes of similar - looking species too. Make sure you don't come home with a chinese algae eater by mistake though 
Most of the other fish it can be mistaken for are perfectly harmless but the CAE is deffinately something you DON'T want.
However, they are also intolerant of their own species and sometimes of similar - looking species too. Make sure you don't come home with a chinese algae eater by mistake though Most of the other fish it can be mistaken for are perfectly harmless but the CAE is deffinately something you DON'T want.
