I hate using test kits for things, especially PH. I like to know at a glance what my PH is. My problem with those hand held PH testers is that they need to be kept in solution/tank water or they dry out and then can't be used anymore.
I've had 2 of those style units and fried them both.
I use an Aquacontroller to monitor my PH now. I do use it primarily to control my CO2
input to my Ca
reactor, but pull it from the effluent from time to time to get a read on the tank PH.
Being able to monitor PH with a controller gives you the ability to react to the swings with a productive counter so that you can level them off.
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