I like center too with a split return, one in each corner. I wouldn't lower the return as you will have backsiphonage problems to the sump when power is off, keep it as high as possible since it will determine the tank level in a power outage.
All you need to do to stop the siphon is drill a small hole in the return pipe or Loc line in the tank. Not a big deal. Really, you should stick to what you invision your tank should or will be,seams your doubting every step of your build. You've got lots of experience trust yourself you'll enjoy it much more.
All you need to do to stop the siphon is drill a small hole in the return pipe or Loc line in the tank. Not a big deal. Really, you should stick to what you invision your tank should or will be,seams your doubting every step of your build. You've got lots of experience trust yourself you'll enjoy it much more.
NEVER EVER rely on drilled holes. Just like a check valve they require cleaning and maintenance and will still eventually fail, almost guaranteed.
All it takes is a piece of algae, a snail, a small fish, an anemone, some food etc, to cover the hole and you are done.
The ONLY reliable method of backflow prevention is the simplest form known to man, requires zero maintenance or cleaning and cannot fail ever. An air gap. Leave the return close to the surface so with only a small, very easily calculated backsiphonage until the return is exposed to atmosphere the siphon breaks and the flow stops. no guessing and you can sleep soundly at night. We all know water cannot jump uphill so it cannot fail.
In my case with a 100G display I siphon 3.5 gallons to my 30G sump before the siphon breaks. It is as simple as length x width x the 3/4" or 1" or whatever you are comfortable with divided by 231. Mine is 18" x 60" x 3/4" before the dual returns are exposed and it cannot drop aqny further than that and it cannot fail, simple as can be and no cleaning or sleepless nights wondering if I am going to have a flood when the power goes out.
Well...you can't end it like that Jamie... You need to mention the one bad hole and any advice to others attempting to drill their own tank.
Dang I'm all over the place with this build-lol. What happened was that at the end of drilling the first hole the drill stopped abruptly which is what I believed caused it to crack.
I started drilling on #3 as the bit wouldn't rotate on #1 . But I never turned it down like I should I have once the groove was established.
I don't know if I'm explaining this right-lol.
Originally Posted by AZDesertRat
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