Overflow gurgling sounds...

[LinkinReef]

I installed a pair of durso stand pipes on my 210 and I drilled the small hole on the top cap of the drain but once in a while the right side does a loud gurgle and the water in that overflow drains about 5 inches and then comes back up again, I already drilled a very large hole on it going from the very smallest size to the largest and it does this just once every 10-20 minutes or so. It used to do it over and over until I drilled a larger hole.

Could this also have something to do with the lenght of the pvc drain of how deep inside the sump/underwater it is? Currently the end of the drain is about 6 inches under water.

Any ideas?

 

[James77]

It could, yes. I've had the same problem when the drain lines dips down then back up, instead of steadily downward. Water would build and cause a siphon.

 

[iamwrasseman]

just slow your return down a bit as it sounds like your close to getting it from siphoning .

 

[willybub]

for some reason the hole you drilled on the one is not big enough and is siphoning. if you can drill it a little larger and install a small valve on it so you can adjust it to where you need it

 

[ReefMonkey13]

for some reason the hole you drilled on the one is not big enough and is siphoning. if you can drill it a little larger and install a small valve on it so you can adjust it to where you need it

+1 on this.

I use to have the same issue with my tank . . also make user that the hole is clogged with anything.

Good Luck

 

[LinkinReef]

the biggest drill bit that I have is a 5/16 and that's the one I used, could I maybe drill a small hole right next to the big one or would it be better just to buy a new bigger drill bit?

Should I cut the pvc drain that's under water to make it not do in so deep underwater as well or just make a bigger hole on the top cap?

 

[LinkinReef]

Bump

 

[iamwrasseman]

just turn your return down a tad and it will stop gurgling .or ?