Originally posted by: flxnimprtmscl
1. You want to go freshwater. A saltwater setup that size will cost you uber $ and you'll either kill everything in the tank or spend so much time on it that it will be overwhelming
2. Make sure that it's actually an aquarium. There are differences in glass thickness between aquariums and terrariums. Without knowing your dimensions I'm going to guess
that your glass should be somewhere in the 3/8-1/2" thickness range. Measure it to be sure.
3. Filtration is important. Filter effectiveness ranks as follows Sump/Wet Dry > Canister > Hang on back. HOB filters pretty much suck imo but if you want a decent inexpensive HOB check out aquaclear. Also, filters ratings should never be taken at face value. Generally you can cut a filters rated capacity in half if you want to be accurate and really keep your tank clean.
4. Don't just fill the tank up and go dump some fish in the same day. You'll kill/harm your fish. Read up on properly cycling a tank
5. You'll need a water test kit. Don't get test strips as they suck. Go with the API master test kit for freshwater. If you have a petsmart around they have the best deals as they will pricematch to their own web prices which are considerablly cheaper than in store prices.
6. Search for and read up on anything you're confused about at
www.aquaricentral.com
7. Make sure to do your research before hand. What types of fish will live together. Do you want plants, if so what do you want to spend on lighting, fertilizers, co2 injection, etc.. Trust me, you'll save yourself a ton of headache and a ton of money if you do your homework first.
Hope some of this is helpful to you. Good luck.
Edit: One more thing I should mention is if you want to go heavily planted you should pretty much look exclusively at canister filters. Both HOB and Wet/Dry filters will gas of CO2 which is essential to plant growth. I've got a wet/dry on my 125 gal and while it's great in terms of filtration it sucks for my planted tank.
Live plants are good btw. Your fish will produce waste in the form of ammonia and nitrites which are very harmful to fish in even small amounts. The bacteria in your water (see cycling) will turn those waste products into nitrates which are less harmful in small concentration. Plants eat nitrates as a from of food which will help keep the concentration of nitrates in your tank low and keep your fish healthier.