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					Originally Posted by Skimmin  Say what u want but i've had numerous tanks with herbies, no ato and no problem keeping them quiet. A valve will make all the difference because the fluctuation in the return compartment is now irrelevant because of the back pressure caused by the valve. A valve does nothing to change the speed of the pump.   I'm not sure where u got that from... It just gives it a consistent restriction to pump against... Anyways...  I'm not here for a debate. I'm just offering suggestions for duncan. | 
	
 Yeah your right , since it works for you it must work universally for everyone as is the law of reef  and you've def got more experience then me from what I can tell , if that's what we're gong by lol pay no attention that several people have pointed it out as well  but when your right your right , right?;p
Would be simple enough to test .......fill return chamber , set herbie , let chamber drain , see if herbie stays set....easy peasy
