1. How long does a PH probe last and dependability :?
2. Accuracy of a refractometer vs. a swing arm type :?
3. A brand of a good calcium test kit :?
4. A LFS which can test your water using quality equipment, so I can
compare the values on my test kit :?
Thanks
John
2. Accuracy of a refractometer vs. a swing arm type :?
3. A brand of a good calcium test kit :?
4. A LFS which can test your water using quality equipment, so I can
compare the values on my test kit :?
Thanks
John