What size hose do i need to run for my 55 gallon bio filter, i currently have 1" coming from the pump to the 30 gallon filter and it is PVC with 4 90* elbows and 2 45* degree elbows i think i could get more flow from flex tubing, It comes in 1.25 1 or 3/4 " at my local lowes. So my question is what size hose? The pump is a tetra 1000 GPH model and the pond is roughly 1200 gallons I have maybe 10 ft of PVC right now that i am using and the filter is roughly 3 ft above water line.