We have a 55g and a 15g that have been cycled in the house. My daughter has decided she wants a glo fish tank in her room. We set it up today, using the filter and heater from the 15g tank and all new decorations. I found 10% pure Ammonia at Ace Hardware and added around 1.5mL to it. After it tested around 3ppm. Now the sit and wait begins..