What is Reddit's opinion of TTSTAR Digital PH Meter Tester, 0.01 High Accuracy Quality 0-14 Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC?

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Some nutrients will change the color of your water so you wont be able to get an accurate measurement. Spend 15 bucks on a digital pH pen and learn how to take care of it.

I've been using this one for years

I’m very picky, so I try to keep tabs on all the essentials like Ph, temp, humidity, wind, etc. I have to be careful though from overthinking it as well, but I’m an analytical guy that likes that stuff.

The Ph tester and Ph kit I have are:

Cakie Digital Meter, 0.01 High Accuracy Quality 0-14 Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC, Yellow https://www.amazon.com/dp/B01N20ZRC5/ref=cm_sw_r_cp_api_i_C41qCb1009HZJ

The above is not the best out there, but it does what I need. You will need to calibrate this one every once in a while with a Ph buffer solution. 1 pack is included for initial calibration. There are probably better, more expensive ones out there, but this does the job for me.

General Hydroponics pH Control Kit https://www.amazon.com/dp/B000BNKWZY/ref=cm_sw_r_cp_apip_dcrDFbJuuvORh

This has what you need to actually adjust the Ph up or down. It also comes with drops to visually test the Ph. This works well and I use this to verify the above digital meter. I’m not doing lab work, so “close enough” is good for me.

I monitor temp/humidity with an inexpensive meter: AcuRite 00613 Humidity Monitor... https://www.amazon.com/dp/B0013BKDO8?ref=ppx_pop_mob_ap_share

The thing I skimped on and now I’m paying the price is ventilation. My tent is only 2ft x 2ft, so I’m only using some small USB fans for intake and exhaust. As soon as I powered on my COB light, the temp went higher than what I like, so I ended up ordering an AC infinity T6 fan that monitors the temperature and humidity and adjusts fan speed accordingly. This was a little pricey, but I like gadgets, and this should be a major improvement in my setup.

https://www.acinfinity.com/component-cooling/inline-duct-fan-systems/cloudline-t6-quiet-inline-duct-fan-system-with-temperature-and-humidity-controller-6-inch/

Like any other hobby, you can go as cheap or as expensive as you want. You’ll have to find your happy medium, but no matter what, it’s important to have something to gauge these variables, take notes, and adjust and learn from for next grows.

Without a meter, you’re shooting in the dark. Unless you can find ph’d bottled water, it’s almost as good to power through it and do nothing. Here’s the meter I first bought (it lasted about two months). And here’s what I ended up with, and I couldn’t be happier (I also picked up a bottle of calibration solution).