pH test kits

[sillygoose]

I have been using the old API pH test kits for years now. I have been dealing with pH issues (again) lately and, out of curiosity, I brought a calibrated pH meter home from work the other night. Well the test kit wasn't even close. I even checked the standard solution three times to make sure the calibration was good. Not long ago, I tried two API to see if they agreed with each other and they did. I now have no faith in the test kits.

I found a pocket-sized industrial pH meter in a catalog at work, but it was $200. Surely there is a better alternative.

 

[itsmateo]

Check out milwaukee, they make some PH meters, I picked one up from a guy in PHX, for $10.. It definatly has come in handy.

 

[sillygoose]

Have you compared it to a test kit?

 

[brettinteriors]

Are you testing alk/kh

 

[fishaholic911]

I used Salifret test kits, YGPM

 

[xpertrifle]

I have one of the Milwaukee testers, It works. But has to be calibrated with a solution frequently.

 

[jjk_reef00]

I have a Milwaukee one I'll sell for $20 but you need to buy a ph probe. They do work but you need to calibrate them every once in a while. I had to replace the ph probe about once a year.
Test kits fluctuate quite a bit depending on the brand and age of the kit. A properly calibrated ph probe is a better option.