good point about those regulators on the hose.... especially the cheap ones can be a restriction especially if the source is already low...
One more thought. if you're using the onboard pump.... I have found taht if I have air in the lines, I get a lot of water hammer noise, pulsating flow, and reduced flow rate..... some times it take a while for the air to work itself out.
Regardless, that oxygenics is a good buy.
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