I have a 60 gallon tank, 60 pounds of live rock,60 pounds of live sand, reef octopus protein skimmer rated for 200 gallons and a Flilstar xp3 canister filter. Right now the system is working extremely well with 6 fish(clown,4 Chromis and a hawkfish). I would like to have 9 or ten. Does this sound unreasonable?