pH Meter SMS120 w/Alert

I bought this pH meter about 3 years ago along with a Co2 pro system for my planted aquarium. I calibrate it very infrequently, and even given that, it does a terrific job of regulating my Co2 to keep my pH where I want it and the plants thriving.

Truthfully, all I ever bother to do is look at the display to see where the pH is, I make sure the Co2 canister isn't empty, and take a peek at the bubble counter. If you use a timer to turn off the solenoid when the aquarium lights go off you'll have a fully automated Co2 system for your plants and it's a dream! I'm disabled and very limited in what I can do. Anything that makes life easier, even if only a little, helps a lot so I automate everything. I've found that calibrating my probe two to four times a year with the General Hydroponics Ph 4.01 & Ph 7.0 Calibration Solution Kit (also on Amazon) works perfectly. I just put a little of each solution in a couple of fresh ziplocks. It'll take ages to run out of solution and my PH probe stays accurate.

Make sure to keep the instructions, even if you just put it in a little bag and tape it to the back of the meter. You'll want to have it handy each time you calibrate.

I can't say this about most of my aquarium equipment, but if my pH meter ever dies I'll get another exact same one right away.

Works great but looks nothing like the picture mine is beige in color and shaped differently but who cares the green is kinda ugly..

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i like the device, but it was upsetting not to have both testing solutions for calibration. it only comes with the ph 7 and is missing the ph 4 solution.

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