Hi Prof,

I use the AM1000 with a 500 gph Mag drive on my 180 gal.

I used to use a 250 gph rio, and did not get optimal results for my size tank........

Higher rate works very well for me and was blessed by Tom

I have a reef ready (twin overflows) and large sump/trickle filter, so c02 loss is an issue with this setup. The venturi mod and larger reactor pump work well for this scenario, and is why I recommended it....

Have a great one....