how to quiet overflow - help

[Jcearl]

Hello all and thank you for reading this. I currently just set up a deep blue 60 gallon rimless cube reef ready. my problem is, is my durso overflow is creating a siphon and when the water level drops it gurgles and when it raises it is dead silent. when I increase the flow it stops gurgling but the flow is too much for my corals and they start to close up. the return max output is about 1900gph. now I have a few solutions, but I don't know what would be best also if you have a another idea I would love to hear it. 1.) I could leave the flow high and would my corals get used to the high flow or would it just batter them and make then always look deflated? 2.) or could I increase the size of the air intake hole in the top of the durso to increase air flow so it wont create a siphon when the flow it turned down to half of full? 3.) or could I put a pvc ball valve in the drain line to tune it in to match the flow? everyone's advice is always greatly appreciated

 

[prsnlty]

Personally, I would go with the last option you suggested.

 

[Eric B]

I would never do #3 on a standard durso return. I would try to increase the size of the hole in the top of the durso and also maybe play around with the return flow a little if there is a ball valve on the return. More than likely this hole is too small for the air required but I would only drill it small steps at a time or go to home depot and get another cap to play with before drilling out that one. Once it is the proper size water level should stay steady in overflow and I really can't hear mine much at all.

 

[Jcearl]

what about getting a Y loc line splitter for the return and putting two flexible ball socket tubing on so this way I could keep the flow high but at the same time now having too much flow in one direction?

 

[Jimbo662]

Or you could switch over to a hervie overflow with a gate valve on the drain.

 

[Jcearl]

I would but the tank only has one drain and one return so I don't know how I could make that work

 

[Jimbo662]

Ah...yeah, that wouldn't work.