While I'm still looking for a low-range NO3 test kit, I'm also wanting to get more precise with my pH levels.
The AP test kit I'm using now goes from 8.0 to 8.2 to 8.4 - pretty big ranges.
There are hundreds of electronic pH testers on eBay that read down to the hundreth - are any of those $25 meters any good? They're mostly Chinese, from a "Hanan" manufacturing, I think.
I won't ask about specific ones, to avoid violating any rules, but it seems like these would be great (if they worked).
The AP test kit I'm using now goes from 8.0 to 8.2 to 8.4 - pretty big ranges.
There are hundreds of electronic pH testers on eBay that read down to the hundreth - are any of those $25 meters any good? They're mostly Chinese, from a "Hanan" manufacturing, I think.
I won't ask about specific ones, to avoid violating any rules, but it seems like these would be great (if they worked).