Quote Originally Posted by bluebayou View Post
I tested the phosphate level with the both. The Natural Chemistry one shows over 1000 ppm for phosphates. The Aqua Chek one shows at least 300 ppm, maybe a little darker.

Interesting.

When I did the side-by-sides with the Taylor and the AquaCheck, I got similar readings below 1000 ppb with both. But above 1000, all the readings from the AquaCheck were the same. I'm some what confident of my results, since I started with tap water (about 3,000 ppb at that location) and did successive dilutions with distilled water. So, even if my starting value was off (not 3,000), I knew that each succeeding result should be 1/2 of the preceding one.

I wouldn't suspect Natural Chemistry of deliberately creating a kit that overstates PO4, but I would suspect them of not caring much when someone pointed it out. After all, having a kit that shows their product as being more effective than it is would help them sell product.

I'll be VERY interested, once you reach PO4<100 ppb, to see what the Natural Chemistry test shows.

BTW, I've revised the phosphate link above. It took me several phone calls to Kem-Tek (KIK) to find out what's going on. Apparently, they are slowly closing out the Kem-Tek brand and replacing it with the Clorox brand -- but KIK is blending and packaging all the products. Their chief chemist told me the products themselves are completely unchanged.

However, because Amazon has not yet distributed the Clorox products to all its warehouses, Amazon is showing the Clorox products as "temporarily unavailable" which apparently means "since we don't have the product in all locations, we don't want you to hold us to our normal shipping standards"!