hmmmm, i do have a air pump on my tank with one 24" bubble wall as well as a small green stone on oppisite end of tank, should i have more for "proper" balance ? defintly diatoms i have, would it be that my tank was setup in march or april of this year, and i added oscars and other fish tht grow big before it was matured and with the heavy feedings it tryingt o catch up ??