FeedMe Fertilizer

[Alan Sailer]

After getting some information about ca/Mg supplements I did some searching and decided to buy FeedMe fertilizer for use with RO/rain water ie low dissolved solids.

I received the stuff yesterday and dissolved 1 teaspoon into a gallon of my RO water which has a TDS of about fifty.

Checking the pH after the mixing I was surprised to see a reading of 3.8 which seems way too acidic. I could use lime to raise the pH but it seems strange that I would need to do this. The baseline pH of the RO water is 7.

Am I over measuring this or is there a problem? In the past I have been using DynaGrow and it does not change pH at all. But is has very low levels of Ca/Mg.