I just came across one of my old 10 Gal aquariums. This was used for a few very small lizards. Now I have washed the tank out thuroughly and started to add stuff to it. Ive had the filter running for 24+ hours and the heater has it heated to around 75-78 degrees. I have bluish gravel along the bottom. I went out today and got one Yellow Siclet. Part of the Chiclid family. I am wondering what you would recommend as for adding aeration, undergravel filters or just anything imperticular that will help as I add a few more fish and scenery.