Join Date: Apr 2011
Location: Clarks Summit, PA
It would be even easier/cheaper to make it a simple pond with an air pump providing water movement and adding oxygen to the water. I help run a large basil operation and we have a couple acres of ponds and not very much oxygen added but it grows the same as our nft greenhouses. Tomatoes might need a lot more oxygen since they grow quite a lot bigger, but for herbs and lettuce it works fine.