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The flashing 200 would indicate phosphates are above 0.6ppm.Same issue here. I run a zeovit system with zero algae issues. I’m sure my phosphates are in line, yet my brand new ultra low Hanna is flashing 200 after retesting the same solution 3 times same result. So I tried a new regent and sample, still 200. What’s up?
How much diluting is recommended? Is that accurate?
HELP