Hi all, I'm new here, but have been reading your posts which has made me sure I am in the right place to ask questions. I have a used 55 gallon tank that I plan to move my freshwater Angelfish into. I used to have 2 angels that paired and lived well in a 30gal. with a Chocolate Catfish, but a month ago, the female Angel died (no physical indication of what was wrong, and the pet store test of the tank water didn't show anything wrong). Anyways, I wanted to introduce new angels, but I read that it would be better to put my old Bart and the new fish into a new tank to deal with any territory issues. This is where the 55 gallon comes in. Also, I took in a 30gal. from someone who accidently killed a number of fish and didn't want to deal with the survivors (1ft. Pleco, 1 tiger barb, 1 neon), and I was thinking of adding the pleco to the 55-is this a good idea if I want to have live plants in the tank? I am not planning on having a lot of live plants but I understand they may get munched on by the pleco. For filtration, I have a very good canister filter that I will use, but can I also use and undergravel filter in tandem? As far as lighting, I have a Coralife light that was used for a marine setup, can I use this for the tank? Thanks for your help and suggestions, and I hope I posted this correctly.