Calcium Reactor - flow meter or pump

[tanktoyman]

I am currently using a needle valve on my return from my calcium reactor. Is there a flow meter or metered pump that you can recommend for replacing a needle valve?

 

[KrisReef]

This is what I use to meter water through my Calcium reactor. Needle valves never worked well, but it might be ok to open it up and still use it as a pressure supplied water source to the reactor with the Kamoer keeping the flow in check?

Kamoer FX-STP WiFi Continuous-Duty Peristaltic Dosing Pump

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[Gtinnel]

I use an older masterflex peristaltic pump to control flow for my calcium reactor. I looked into flow meters for my calcium reactor but was told that flow meters probably wouldn’t work well at such a low flow rate. Or at least the Neptune one which I was considering.