Flushing

[johnyboy]

My new cornerflo marinand tank keeps flushing. The water level keeps fluctuating above and below the hole on the drain pipe. It's driving me nuts. Please help.

 

[aquaman67]

Sounds like it's not getting enough air?

Check your air hole.

 

[johnyboy]

I did. It's a little straw coming out of the top of it. Maybe it's not big enough?

 

[gtbarsi]

Or your return pump is feeding too much for the drain to manage w/o covering the drain air intake and causing the drain to go full siphon. Once the air intake is uncovered you get the large air and water sucking sound.

 

[aquaman67]

Or it's clogged. It doesn't take a big hole - 1/8" or so. But if it's not getting air, it will make the water level go up and down.

You can adjust the water level by adjusting the amount of air.

 

[kschweer]

Do you have a picture of your drain? If I remember correctly the 90 with the 2 holes drilled on the sides should be on the front. Also if you have a ball valve on your return try turning the flow down a bit.

 

[johnyboy]

 

[johnyboy]

 

[wangspeed]

I plumbed my 90 as a Herbie. Difficult to make the switch since you are all setup and near a wall

 

[Fin]

I have never had a Marineland tank, but if that were my situation to deal with, I would either dial back the return pump a little (as has already been mentioned), or take a closer look at the vent on top (you said there was a straw at the top). The hole with the tubing on top - is the tubing pushed down too far (like below the water line inside of the pipe)?

 

[Rutrag]

I did a mod on my 65. I with I'd have set the intake about 1/2" higher as I do get noise coming through the weir, but none from the intake. I used a tee and street elbow, and put a cap at the top of the tee with about a 1/4" hole.

Lights aren't on yet, but this should give you the idea.

 

[Rutrag]

My return pump is a Quiet Flow 3000 by the way.

 

[beaslbob]

If tha't then air hole on the side you need a hole in the top.

 

[buzzword]

Make your hole bigger. Keep going up one drill bit size at a time until you get the water in your over flow to stay at an even level which will stop the flushing.
I did my own durso drains and that is what I did and once I got to the right size hole the water level stayed even in the overflow and the noise decreased to almost nothing.

 

[Finnaddict]

x2 on what buzzword said. Just drill with a little bigger size bit until it stops flushing. Jut needs a little fine tuning.