air pump question

how many liters per minute do i need per 5 gallon bucket for a dwc system....not sure what pump to get?????? ive got 9 buckets. is a 110L/min pump complete overkill or can i get away with one thats like 45?...

well i bought one of these systems 12 pod Hydroponic gardening Recirculating bubbler on eBay, also Hydroponics, Plants Seeds Bulbs, Garden Plants, Home Garden (end time 31-Jul-08 10:06:01 BST) (in black) i'm only going to us 8 pods, so i gave it a test run with the hole power from the 75lpm into 8 air curtians and it is impressive, but i'd say i could use more only for the noise.
They say, "you can never have too much air bubbles going to your roots."

In my own experience with DWC, you need a lot of air and you want an airstone directly under each plant for maximum performance. With one 5 gallon bucket (4 gallons of solution), I use a pump rated for a 40 gallon aquarium tank. Basically take the gallon rating of the air pump, divide by 10 and you'e in the ballpark. You can go less but you really want the DWC to look like a rapid boil.

I use the "Whisper" series of air pumps since they are very quiet.

The above advice is very good, "you can never have too much air bubbles going to your roots."

Whisper 40 Air Pump (Tetra)

I read on the Lucas thread before 1 Watt per Gallon