2 part dosing help

[bkelly]

I am starting to dose my 22 gallon with 2 part and had trouble totally dissolving the NaCO3. I Followed recipe #1 and heated the DIRO water while stirring but still couldnt get it all to dissolve. So do I dose with precipitate left settled on the bottom? Its not a lot of undissolved , but doesnt that change my KH concentration in solution for dosing.
Any help is appreciated.