Filtration so far is the 700 pounds of live rock I already have, a 120 gallon sump, Skimmer rated for 1000 gallons, return pump is a Reeflo Hammerhead (Should get 4000 gph out of it), a growout tank for some macro algae (Cheato) and am looking into a pool sand filter to be added on at a later date if needed.
What size foot print would you say the cats like to breed with? I thought the 6'x3' would be enough.