- Joined
- Nov 5, 2018
- Messages
- 73
- Reaction score
- 23
hey everyone, I was wondering what was the difference in the reading with the ULR hanna checker and the regular LR, what are the safe area readings for them, Ive been testing with the ULR and have gotten within the last 2 test ive run, 0.51 which was 9/20/20 and now i just did another test and it came out 0.52, i was wondering what are the safe areas to keep the phosphates at with these testers, this isnt much a question about the testers its more of a question about the chemistry of the water.