I am looking to buy a new phosphate test kit as mine dose not seem to be giving me reliable answers. I can test 3 times and have a test range from 0-.68 on the redsea test kit. Its aging and maybe contaminated by this time. So I was lookin at the Hannah checkers for phosphate and they have two. ULR and low range. I figured these are the best way to go and was curious which one is the appropriate one. I was thinking ULR, but on BRS there is only one review and 250 for Low range. The ULR ranges from 0-.90 and low range from 0-2.5. just curious to see what you guys are using or even another type of test kit! thanks.
