Hello I just filled my 200g Pentagon tank last night with a hose to test run pump and sump and the second I start the pump I am half way up the teeth on my overflow in tank and have little to know return pressure, I am using a Lifereef sump and a Blueline 40x return that should be around 650 +- gph with total head why is this happening? Am I missing something with the pump wide open it will almost overflow the tank overflow is set with 2 x 1" drains and 2 x .75" returns split with lineloc so there is 4 outputs and can feel little to no movement from ends..?? Thanks for help in advance I feel sick to think this is normal for what I have spent..