The test kit is made by Natural Chemistry.

I have been round & round with alge blooms for the last 2 years. Water always test fine as far as my clorine levels & stabilizer levels. I even tried keeping the cl higher than needed according to the charts available here & still ended up with green water after a month or so.

Nitrates have NOT been found in my pool water. Last summer, I treated for phosphates ( major pain in the butt! I only did it as a last resort) & went the next two months with clear water. I don't think I got the levels down as far as they are supposed to be but it was far enough to help control the algae.

Too bad the info from last year isn't available, I had lots of posts regarding the problem & also got quite a bit of feedback from the "pool god" Ben!