Seriously you should look at the AP-100 or smaller series. That's alot of buckets and you need alot of air...
I own an AP-100 and it's ROCKS. super quiet (compared to the sunleaves durapump i have) and pumps WAY more air.

Search for Pondmaster AP-100 Price varies alot site to site so exercise due diligence
--chris

Just a suggestion, but air pumps don't like water. Be sure to mount the pump UPHILL from the reservoir.

There are tiny check valves available at the pet store, which will stop water from being sucked back into the pump should you experience a power failure.

I've toasted many a small pump by getting water backed up into the reed valves. When that happens, it's just a paper weight!