Join Date: Jan 2013
Location: Chesapeake Virginia, US
Just turn the flow down, I run a Fluval 306 on my 29g and have the flow set a just under half of what it's capable. If I'm doing work in the tank after I'm done I turn up the flow and then catch the big bits that float up in a net and then let it run for about 5 min. After that the water is usually clear again and I turn down the flow rate.
I'm really enjoying having a big canister filter and would never go less than double sizing one.