How many fish for my tank?

I have a 75 gallon, 20 gallon sump with about 100-110 lbs LR.

I have now, 2 false percs, one yellow tang, one watchmen goby, one Lubbock fairy and 3 asst cromis. One cleaner shrimp, sea cucumber, and one urchin.

I want one or two more if I can support it. I would like a beautiful fish, med size like a tang.

 

what size skimmer do you run? your tank seems pretty stocked now, definately not another medium size fish like a tang though. The yellow is pushing it but can be done. I wouldnt suggest another tang but maybe a chromis, or anthias. something smaller.

 

Yea, what kind of filtration? That, water change frequency and amount, etc. would be good to know. Depending on what you use, what you have now could be too much, it just depends.

 

I have a AquaMaxx 120 p-skimmer and a penguin 400. Water change is 10 gallons a week.

Ill prolly stop here, get more coral and get a 75 gallon sump. I want to get rid of the goby and clowns. Replace with true perc and a different goby.