Yesterday I decided I needed to relax more and take up a second hobby so I bought a 29 gallon aquarium. After about 3 hours, the stand and aquarium were complete and in place with gravel, decorations, water (treated with dechlorinator) and filter. I have yet to put my heater in because the water's still too warm. I can't wait until the water temp goes down enough to get my fish. (Don't worry, I'm going to do a pH test to make sure I don't burn them when I bring them home.) Since this is my first aquarium, I have a question or two I feel sure someone can answer. 1. I live in Arkansas which has very high humidity coupled with high heat. I am targeting the water temperature to be around 73°F but it is taking forever to cool down. When I filled the tank, I used only cold tap water and it was still 86°F in the tank. So since about 8PM yesterday, I've had my air on with the thermostat set at 68°. So far the water temp has dropped to 75°. During the hot days, how difficult is it to maintain a 70°-75° range with a 29 gallon tank? Also do fluorescent bulbs put off enough heat within a 12-hour period to drastically change water temp? 2. I really like the Fantail goldfish but I also like a variety of pretty fish which are not agressive. Of all the freshwater fish I've seen, my favorite is the tiger barb. I have heard that these are semi-agressive and will nip at the Fantails. Would these two species be compatible tank-mates (say I start with one Fantail and a school of about 6 tiger barbs, then after the tank cycles, add another Fantail and possibly two Otocinclus)? If not, what would you recommend? 3. The power filter which came with my tank is an Aqua-Tech 20-40. Will this provide sufficient biological filtration or should I purchase one with a Bio-wheel? Thanks in advance for your time and answers!