I rarely check mine. I do have a one of those hand held electronic testers, and if I am feeling ambitious I will take a look. It is usually around 8.1/8.2. When I get a controller I imagine I will keep a closer eye on it, but otherwise I have no reason as everything seems to be healthy.
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor.
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