Ordered an Eheim 2213. I should have went that route first instead of the AC30 and AC20
I found buying the proper filter is the hardest thing to do for the gph aren't correct. For example I have an Eheim ecco 2232 on my 29 gallon and it is not strong enough. The rating for it is - 127 gph up to 35 gal. Love the Eheim filters though, for they are so quiet.