[quote=tsicar;1103468]
Quote:
Originally Posted by mellow  your airstones are not going to be an efficient way to do it.
profit margin is low, and you have to keep your costs down. |
This was the discussion in the AP forum, airstones aren't efficient enough, best to use the pump for aeration as well.
The profict margins are definitely low, I had did research for AP but decided due to the abundant water in Thailand, there's no way it could be profitable.