There are a lot out there. MFK has done well for me so far in recommending products. I want a larger pump to run possibly multiple tanks/lines off one pump. What is a good one? Also, I want it to be quiet.
Out of the smaller ones, the ones I've had success with are rena 400 air pumps. They seem pretty heavy duty for what they are. I run one on each 75 gallon. Check out the video below. That's how much air they put out. That's 1 Rena 400 pushing 2 airstones.