DT water level question

[jpfaubel123]

Hey guys, i have been maintaining a buddies tank the past couple weeks and he asked me why his tank water level runs so high. So I want to figure that out if possible. The tank is a 300 gallon deep dimension tank, running a blue line 100 external pump. The water level is abotu a 1/4 of an inch below the black plastic bracing. His filtration/sump is in the downstairs storage room which has about 10ft overhead. I did a test to see if it was the overflows not handling the water being pumped to them, and it worked fine. My test was taking 1/2" vinyl tubing and starting a syphon from the DT into on of the overflows built in to see if it can handle the extra water. When i did this the water level dropped to where we want it to be and the over flow boxes handle the amount of additonal water being syphoned over. But when i take the syphon out it raises right back to what it was. Ive cleaned the piping which is brand new nothing is clogging, nothing it clogging the teeth on the overflow boxes. When i started the syhpon the sump water level raised a few inches which i didnt like, but it was mainly just a test, if i slow the pump down it does not do anything. It is open all the way regularly. Any ideas, or opinions would be greating appreciated. thank you


john

 

[NobleSun27]

Maybe the overflow box Is not big enough. the pipe might handle it but the box itself is too small, basically not enough box surface area to handle that amount of water. Good luck

 

[jpfaubel123]

Maybe the overflow box Is not big enough. the pipe might handle it but the box itself is too small, basically not enough box surface area to handle that amount of water. Good luck

It's a marineland 300 deep dimension. So I'd imagine the two overflows they out it should be able to handle it.

 

[wangspeed]

I've seen 300DD where the waterline touches the bracing. I think it sags on some.

 

[jpfaubel123]

He just isn't comfortable with it being that high

 

[evolved]

That's simply how the 300DD tanks go. It's an artifact of where the overflow teeth are placed. Short of modifying the teeth, there really isn't anything feasible to change this.

 

[jpfaubel123]

That's simply how the 300DD tanks go. It's an artifact of where the overflow teeth are placed. Short of modifying the teeth, there really isn't anything feasible to change this.

So there's nothing I can do.

 

[evolved]

Not really I'm afraid. The only "no-mods" option is to turn the return pump way down, but that's not much of a practical solution.

 

[jpfaubel123]

Not really I'm afraid. The only "no-mods" option is to turn the return pump way down, but that's not much of a practical solution.

Thanks for the input by the way. You say no mods way, way mods are possible to try

 

[evolved]

As I said, you'd have to modify the teeth; cut them lower. But with the double walled overflows the DD tanks have, there wouldn't be much to gain unless you cut down the height of the back panel too.