1st time grower. Running into some problems.

[Sleepy T]

It looks like you were borderline low P at 25% strength, and now high K / low Ca at 50% strength.

I'd assume 20 ppm Ca for your water. That 80 ppm is probably the total hardness (all ions), the 40 ppm is probably the hardness of calcium carbonate alone (CaCO3), of which half is calcium atoms (Ca+).

Wow! this is great! Thank You, I will give this a try. Thanks everyone!