WE got the sea crop last night, and made a 1% solution with out 16ppm tap water. WE let this sit overnight. PH when we made the mix was 6.6. Overnight it raised to 7.4. Does anyone have experience with this? SHould i be using the ph of the initial formula or after it stands still as a reference point? PPM remained the same so the ph change was NOT due to evaporation.