I just recently bought a 180 gallon tank for my African Cichlids and I was wondering how many fish would you guy's reccomend as a maximum total of fish to keep in it. I have two outside filters that pump about 700 gallons per hour each and I do weekly water changes. The guy at the store who seems to know his stuff said about 40 fish although I think I could have more than that in there. What do you guy's think?