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Hey Thanks for asking... I just did mine.
Cheers,
A.

Originally Posted by Midnight

just squirt some silicone in four equal globs on the bottom of your pump and set it on wax paper to dry/cure....wah lah!

Yep, worked beautifully. Thx

just squirt some silicone in four equal globs on the bottom of your pump and set it on wax paper to dry/cure....wah lah!

Agree to the previous comments. When I do a water change it is visible how the return pump area is where water level goes down in the sump.

Agreed, the return section should be the only place the water level changes.

It should be the return section (going back to display tank), which should also be the lowest baffle in the sump.. all other levels will remain steady until the return section goes completely dry.

Drill them 1/2" beneath the water line. To do this, look at your return plumbing, and mark that spot with your finger tip. Get a helper to turn off the return pump, then lift the plumbing up out of the water to expose that spot where your fingertip still is. Drill that spot. Now drill another one nearby at the same height. Replace the plumbing where it was, and turn the return pump back on.

Now unplug the return pump and watch the results. Plug it back in and watch what happens next, then you will understand this better. It will be noisy, but that's on purpose. You want to break the siphon of water draining into your sump.

you want the holes just below the water lever of your main tank. that way when the water starts backflowing, air gets in and stops it. when the pump starts up it raises the water level and the hole is under the surface so you don't hear it.
i couldn't do this so i had to install check valves.