So my tank has been up and running for a while but my flow reading doesn't seem right. I originally thought it was a sensor error but after a physical measurement, its accurate. The tank is a Cade 1500, which is around 170 gallons. I have a varios 4 as my return. The only thing directly inline with the return is a 57W aqua UV and the 1" flow meter. My flow readings are stable but generally only reach about 290 GPH with the pump at full power. There are 4 elbos and 2 45 degree fittings in the circuit, which I know isn't ideal, the head height is about 4 feet. That being said, I wouldn't expect the flow to drop off that considerably from the 1050GPH at no head pressure. My question is, do you think this sounds right and I simply need to start running a larger pump, or is there something else in play I'm missing.