I'm sorry. I got hte visdeo up, but had to leave really fast after that. It's a 20 gallon long with 6 danios, a platy, 2 1-inch long cories, and 2 small angels who iwll move to a tall tank shortly. The tank is mature, been around for 4 months, but was started iwht an already mature biowheel filter. A, n, n, all zero. 2wice a week wc with 10 or 20 percent changed.