What size air pump do I need?

I plan on running four 10 gallon tubs with two 12" air stones in each - DWC. Two tubs for veg and two for flowering. What size air pump and what pump do y'all recommend. Links would be greatly appreciated.

I was looking into this http://www.ebay.com/itm/HYDROFARM-ACTIVE-AQUA-AIR-PUMP-70L-LPM-8-OUTLET-HYDROPONICS-AQUARIUM-POND-/370568341756?pt=LH_DefaultDomain_0&hash=item56479828fc

Would that be sufficient or do I need something else? I'd really just like to use one pump (two if necessary) to provide O2 to all of my tubs.

For that sized tub i just used a single one of these http://www.mrpets.co.uk/index.php?moreinfo=10316&gclid=CIrxs_Sk57ECFQFItAodDn0ARA coupled with an old crusty £1 airstone. Worked just dandy Plants grew as they'd allways grown.

Or this http://www.ebay.com/itm/ACTIVE-AQUA-AIR-PUMP-4-OUTLET-hydroponic-fish-aquarium-/180939198131?pt=LH_DefaultDomain_0&hash=item2a20d10eb3

ZINO420 said:

I plan on running four 10 gallon tubs with two 12" air stones in each - DWC. Two tubs for veg and two for flowering. What size air pump and what pump do y'all recommend. Links would be greatly appreciated.

Click to expand...

hi there to run 4 tubs with 2 12" air stones i would rec a 70 Litres per Minute or bigger air pump me i would go for 150 liters as i had 6 12" stones and i could see that a bigger pump was needed....now i run 6 6" stones in round buckets and its made alot of diffrence....and i did not change my pump just whent from tubs to buckets....(piston air pump)

p.s i have the 70 liter per min

I'd say go for at least the 110lpm commercial pump. Thats what I use for 8 waterfarms or 5gal buckets and I would still like more airflow. Just make sure you put it outside the grow area and put a fan on it, they get HOT!

http://www.horticulturesource.com/product_info.php?products_id=6351

ZINO420 said:

I plan on running four 10 gallon tubs with two 12" air stones in each - DWC. Two tubs for veg and two for flowering. What size air pump and what pump do y'all recommend. Links would be greatly appreciated.

Click to expand...

Air pumps need to run 24/7, If you can find the most energy efficient pump your already saving money.
I buy the General Hydroponics- Duel Diaphragm 20lpm air pumps from Horticulturesource.com
http://www.horticulturesource.com/general-hydroponics-dual-diaphragm-air-pump-p929/?keywords=dual&osCsid=bdade4fdf5a14be511dd4bbb37ff320d

This pump produces 20lpm @ 8 watts per hour, The pump does not get hot.. is very quiet.. has 4 outlets and a rubber vibration dampner. They are more money up front but pay for themselves over time by using less energy to run and cool.

I would recommend one pump per grow site.
P.s. I use 2 pumps per 20 gallon grow site in my flower room.