Help with clownfish nem tank

[Beanz]

Ok thanks for the info, what return would you suggest that is small cause the return area in the sump is unfortunately small. what would b a solution for the powerheads other than new return?? like a box around the powerhead or something? i really looking for a clown that are not overly expensive but something that is not really common but will b happy in this little tank.

Cheers, Ian