help with Hanna phosphate checker

[Magickiwi]

Originally Posted by straightrazorguy

I know, but the difference between 0.10 and 0.17 puts it in the same ballpark. It's not an order of magnitude difference.

Where did the 3 minute rule come from? It takes me longer than 3 minutes to dissolve all the reagent floaties.

The meter shuts off automatically after three minutes. Convenient huh?