possible stupid question (TDS)
If i know that the gh/kh of my local grocery stores RO water is gh 2 drops (35.8ppm)and kh 1 drop(17.9ppm), ph 6.0, can i pretty much figure that the TDS is low? or do i need to purchase a TDS tester?
i'm trying to (very) gradually switch my tank over to 40-50% RO as recommended by a nearby local blue ram breeder. my tap water is pretty high, gh 11 drops and kh 13, ph of 8.0
i tested mixing straight tap with 50% RO and got gh 5 drops, kh 6-7 drops, and ph 6.5
thanks ahead of time for enlightening me!