Planted Tank Guru
Join Date: Jul 2002
Location: Naugatuck, CT.
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Turn the adjustment knob (E) clockwise until you get a reading on the low pressure gauge (F) of approx. 10 lbs or less on the inside set of number (psi). You should now see bubbles in the bubble counter. It is recommended that you use the bubble counter rather than the right gauge to determine your flow rate. Only use the needle valve if you can not get exact flow from adjustment knob (E).The bold and underlining is exactly as it is in the instructions. Now I don't know about anyone else, but to me that sounds like a) you're supposed to keep the pressure on that right gauge at 10# or less and b) using the needle valve is a bad thing! Yet what we're experiencing in the real world is that it's totally impossible to keep a consistent flow with less than about 25-30# on the right gauge, and trying to follow these instructions to the letter, I found (of course) that "adjustment knob (E)" would just close itself up (like trying to get just a steady drip on a faucet to protect against freezing) at such a low rate, barely cracked really.