Secondary Power Heads for BB SPS

[LSU-reefer]

I am setting up a 90g bare bottom SPS and have 2 MP40's for flow. I was going to put my two red sea Reefwave 25's but the glass is too thick. I am debating between getting two more MP40s or the Reefwave 45's. I was planning on using the 25's on the back glass pointing down behind the rock work....

thoughts?

 

[melanotaenia]

Two more MP40 placed lower on the glass to create flow on lower 50% of the tank would work well particularly if you plan to keep Acros on the lower rock areas.

 

[LSU-reefer]

Thats where i was leaning..plus i like that i can get an extra wetside or two and swap them for cleaning.