Hi. On my 50 gallon tank I have a Fluval 406 filter. I have been running a 20 inch long Rex Griggs style reactor and Hydor inline heater on that canister. The flow has gone down quite a bit. Would I be able to use a pump like a Sicce Syncra to move water through the reactor and heater? If so how many gph would be ideal? Thanks in advance for your help.