ok well i recently started a new aquarium from my girlfriend and i have to admit that little 10 gallon got me addicted...i then recently started asking around for tanks that people have and do not use anymore....so i did this and found 2 tanks...another 10 gallon and a 50 gallon...all given to me for no extra charge...i have cleaned them out using the directions from my grandma...i have somewhat high ammonia levels in my tanks and i am sure that is because it is a new tank and hardly used...i really want this 50 gallon to work great and i read of fishlore to use water from older tanks and such and to "feed the tank" every 12 hours or so to get the nitrogen cycle going.... some questions.... 1.) for the 50 i have 2 undergravel filters plus a power filter....are those good options?? 2.) should i use pet store water and feed that tank? 3.) my bleeding heart (aka CARI) has itch and the others dont....wuts up with that? 4.) should i use two heaters each half the amount needed? 5.) i have planned out what to get for the fish in it...is this a good combo?? 1 Bala Shark 2 Kissing Gourami 3 Angelfish 1 Red Tailed Shark ? Discus...maybe..... 2 Upside-down Catfish 1 Blue Australian Lobster any other recommendations??