good idea epond, thx a lot everyone for the help. I am moving into a bigger place in 5 days, and I cant wait to set up my aquariums, and I plan on devoting a large spot of the basement for a HUGE one, (as soon as I can afford it lol) . This 75 will be for cichlids and catfish, and I think I'm gonna go the aragonite method, since I need the ph buffer for the african cichlids.. ughh or do I want texas or oscars. hmm soo many choices