The gurgal sound could be air trapped in the line I had the same drain lines before and that would happen some times. I would put two ball valves on the drain lines one each that is so you can regulate the levels in the overflows without having to cut anything and as well this will most likely cut back the nose especially if you run the water high in the overflows. The holes are there to prevent back syphoning and should not be under water just the screen on the elbow
__________________
To the whole world you may be one person but to one person you may be the whole world
(15  0 Gal reef) profilux ll controller, 2GHL LED strips, 2 Hamilton 250 W MH, 5-2' 65w T-5's, 2 6100 Tunze's, RC 135 Euro Reef skim, dual chamber Calcium reactor, marine tech kalkwasser reactor and now zeovit
|