its best to have your drain pipe larger than your return pipe. for instance a 1' pipe may be able to do 1000gph on a return (hooked up to a pump) but may only be able to do about 700gph on a drain.
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Yes I watched the video and understand you can't match the pipe sizes but you have to have equal amount of water coming and going or you will have a mess. That doesn't mean equal size pipes. No no if I worded that wrong sorry but I ment a foot or maybe a foot and a half from bottom of sump to bottom of DT. Now writing that I realize it must be at least 2 or even two and a half ft including the tanks (20g and 10g). And that is with one right on top of the other. I will post a pic when the caulking Drys enough to stand the sump up. Just applied it so in about 20 mins.Have you watched the youtube video yet? He demonstrates how you CANNOT match drain/return sizes.
Gravity drain will not drain as fast as a return pump unless you upsize it, this is why you CANNOT match them in Size.
What type of setup are you running where you will only have 1 foot from the bottom of your sump to the TOP of your DT????
It was a lot of work and looking at other peoples work Dana had a lot of rich info on this subject. I just couldn't spend 200 on a sump/refugium and needed to start a new project. You can do anything you set your mind toOMG you guys have me so confused with this build. I think I'll just get a lot of snails, crabs and chim pure to take care of algae problem. LOL. I will leave all the DIY to you guys, LOL.