i got two small african cichlids and 1 pleco in a 20 gallon tank, theres about 2 decent hiding spots formed by rocks and 4-5 plants. One of the cichlids(the bigger one out of the two) doesnt seem to like the pleco and keeps nipping at it, the pleco just moves till the cichlid picks at it again, i was hoping the pleco would be my clean up crew but if the pleco doesnt make it, what algea eater goes good with cichlids?