I've done saltwater and I too had a kickin SW pred tank, Miniatus Grouper, Panther, Niger Trigger, Squirrel Fish, Cuban Hog Fish, Harliquen Tusk....awesome tank lemme tell yaz. But the amount of matience I had to put into it and the frustration of watching my fish die for no reason and not being able to fix it drove me crazy. Plus the prices on SINGLE fish was astronomical...crazy beyond belief. Since I've gotten into FW fish...mostly cichlids...i have found more pleasure in the fish that I keep because I am able to actually sit back and ENJOY them. That I think is what makes FW fish the most desireable. Plus the availablilty, lower prices, awesome predatory capabilities...its just a nice combo!! SUPER SIZE ME!!