Tap water and nutrients ppm

[gaggrouper]

So I am doing a test run on my tap water. The county shows a ppm that should only be around 100 of which 75ppm is sodium.

Immediately testing the ppm I get a reading of 230 on a calibrated meter and then after two days I got 200. So although the county report shows it should be 100 I am getting 200.

If I am trying to add some Flora Bloom to get a ppm of 300 should I just crank this up to 500 or just add an additional 100ppm to get to 300. I don't feel like buying 5 gallon jugs of low ppm water every couple days or so.

Thanks.

 

[Digital]

Just add it all up to get your proper PPM. My city water starts at 240 and I have been feeding 1000 ppm successfully.

 

[jojo677]

As digital mentioned, you include the tap water ppm in your total. Here's a similar discussion from awhile ago, that may have some helpful info:
Hard Water PPM and Nutrient Corrections