do i need air bubbles in my tank? also is it better to get rid of my oscar, catfish, and 2 rbps to get about 8 small reds? i have a 55g tank. how long wil 8 reds be able to live in it? should i get less, like 6? is it goood to have driftwood or are big rocks better, live plants or plastic plants? is it safe to feed them gold fish all the time? please help me.