I have this one. Not the same, but the same specs. It's good enough for sure, but I wouldn't mind more air. It's loud as hell! The absolute worst part. I'm not sure why people don't hook up hair dryers. They would be way more air and quieter. I'll rig one up eventually.
It will work okay in such small buckets. It really doesn't take much to provide adequate air. But you may want to add buckets later.
That said, before I converted everything to venturi aerators, I used this line. This one is the best power to cost ration. Noisy, but a pumping fool.