I was trying to search up how many clownfish I should place into my new harem tank, which is stocked with around 7 buble nems at the moment, I read somewhere that 1 clownfish per 5gal is the rule, is this correct? I have a 35g sump with both chaeto and a large protein skimmer, so the tank can handle a large bio-load. I'm going to go with true perculas, how many can I get if the 5 per gallon is not the rule?