Hanna phosphorus help!

[xxkenny90xx]

Thanks for all the advice guys. I'm weighing my options here and in the mean time I'll double check with some of my other low quality testers (api, expired hagen)

 

[lion king]

You are using the ulr reader correct, that one is for ultra low levels of phosphates so it wouldn't be out of the question for it to max out. I know people running nice reefs that always run 1ppm and over. Get a salifert or red sea test and you,'ll likely get an accurate reading.