Ok; most of all, I just want to say thank you for the warm welcomes. Secondly; what is your outlook on purchasing used equipment. I placed an ad on CL that I was looking for a 20 - 30 gallon fish tank; and got a few good replies,but the bes so far was a 30 gal square w/ stand (also includes 2 filters, hood with light, gravel, and decorations). From sounds of things, I may onlt NEED to get a tank heater for it. She wants 50 for everything, and was wondering how good of a deal this is. Also, if I do have to purchase a heater; what wattage any type should I go for??? I am looking for the the most economically efficient (PC for cheapest, since I am not a money tree farmer).