Disodium Phosphate mixing

[Xanthurum]

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.

 

[Randy Holmes-Farley Verified Community Expert]

I don't know the concentration of neophos (Brightwell doesn't say what it is that I can find).

You can use this calculator to get an estimate of the potency of a new solution for dosing. use the entry for potassium phosphate:

http://www.theplantedtank.co.uk/calculator.htm

 

[Xanthurum]

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.