[quote=Smithson;1104457]
Quote:
Originally Posted by tsicar  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. |
That wasn't me quoting about air stones, or profit margin. But I do agree about keeping cost down.
I looked at that picture in the link, and with a trickle tower the only way I can see of putting more oxygen in the water would be to aerate the last filter chamber prior to the water being pumped up into the Bio. I think I would still need air stones though.
Whats the AP forum? Research the profitability of what? Fish farming or air stones?