powerhead venturi

[bluto]

I know I've seen this question dealt with before, but I can't seem to find it in a search.
I have a 300gph powerhead in my 90g. The powerhead has a venturi valve which intoduces air into the powerhead water flow (with the valve open, the powerhead produces alot of very small bubbles...almost a mist).
Should I be running this with the venturi open??
I haven't been because it's much noisier with the venturi open...but I'm thinking the venturi must be there for a reason.
I'm interested in getting a naso tang and want to make sure the water is properly oxygenated.
Thanks.
Bluto

 

[tonka]

Does it go on a UGF? Normally you would not need the venturi open if there's sufficent oxygen. And I don't know what else you have to answer that. Venturis are on PH's for UGF mainly. They also will add "that extra air" if you want. But beware of salt creep. i would leave it off. Just make sure there's other means of oxygen.

 

[bluto]

Thanks.
It's not on a UGF, it's strictly there for circulation. In addition to the powerhead I have an emperor 400 powerfilter, remora pro hang-on skimmer, and a second small powerhead on the bottom blowing across the sandbed.
Bluto

 

[mr . salty]

If it is just for circulation then it is NOT needed.They are on there for use with skimmers.But those bubbles in a salt tank really cause more trouble than they are worth.I would just remove the hose and run it with out the air.That is how all of mine are.