ok i have a cpr type over flow...won't keep up when the powe

[Lunchbucket]

ok, i have a diy over flow i don't have a u tube, it is like the cpr ones...no u tube.. when the power goes out it stays primed but it won't keep up when the power comes back on. more into the tank than out...so i could have a flood. the vinyl tubbing that is hoooked up to it gets air in it (because it drains the outside box to the bottom) then the air takes up space where the water should be and limits the flow. so how do i fix this? anyone please please help. the power never goes off but if it does i don't want a mess of water, burnt up pumps, and shorted electrical stuff.

should i buy a u-tub overflow? it that my best option. i have heard they don't flow as fast. i have a mag 9.5 throttled back slightly as my return pump...will it handle it? my LFS will seel me a u-tube overflow w/ everything for lik $75. i don't wanna spend that money on that but for safety i will!!

later
Lunchbucket

here is my design i have!!
go here and look at the overflow design

 

[fishpoo]

do you have a venturi powerhead on the hose?
thats what CPR recommends to suck out the air.

 

[Lunchbucket]

no, don't know how i would hook that up. i thought about that though

suggestions??

the problem isn't in the place where the up tube would be...that stays primed but the hose and box empty and takes forever to get the air out. please please please help!!

later
Lunchbucket