I have never seen those, but since it says "up to 40 gallon", I am assuming its talking about fish tanks. My opinion is that a fish tank air pump is not going to cut it in a bin that big.

I run something like this:

Its not that big, but moves a ton of air. I have a 19W and a 36W one. The 19W one supports 6 air stones and the 36W does 10. The 36W one is a bit overkill for my setup, but its better to have more air than you need than not enough. The 19W one was like $40 and the 36W was around $70. Your air supply to the roots is the most important element in DWC, so don't slack on it. :thumbsup: