Looking for advice on how much Disodium Phosphate to add to what amount of RODI to make something similar in concentration to NeoPhos? This is what I purchased off Amazon. Thanks in advance for any help.
In case anyone wanted to know I mixed up a batch of the following ratio 1/2 teaspoon to 1 gallon of RODI and decided to try an experiment. I used my Hanna ULR phosphate kit and put 1 drop of NeoPhos in 10ml of water then added the powder. I also did the same with the stuff I mixed and here are the results, the checker would not read either but as you can see the one on the left is a much darker blue than the other. The darker blue is NeoPhos and the light blue is what I mixed up.