I pull through the reactor so the chamber does not over pressure and cause leaks
My reactor leech off the return, no extra pump to worry.
I use needle valve to control the effluent, I also use the little filter designed for the aqua lifter pump before the needle valve to prevent clogging. You'll be surprise how much particles going thru the effluent.
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Where does your effluent drip to?
And where is your return? I assume it's the sump. If so, there's somewhat of a close loop between the input of your reactor and the output of the reactor. Some of the effluent probably never reach the display making the reactor less efficient.
I have been using the one I got from Brs and it holds steady just fine. I have been having to adjust maybe once a month. Where is there a peri pump that can run none stop and last? Honestly curious because it has me thinkingGate valves are the WORST. I'd use a pinch valve. The 1st step in getting a ca reactor to run well in a traditional manner is ditch the gate valve and replace with a silicone line and pinch valve.
Gates open a hole in the center of the mechanism which requires water to move through what looks like a tiny bubble trap in say a sump. The pinch valve will more debris to pass through. If your valve is at the effluent side is usually grit from the decomposing aragonite in the reactor.
The years when I used a gate valve I had to make daily adjustments. Pinch valve maybe monthly. Peri pump never.