I like you have very hard tap water, TDS varies from 370 ppm to 550 ppm! I mix RO:tap depending on the aquarium and it's inhabitants. For example, my community aquarium which has a blackwater Apistogramma species (they are rather sensitive) I bring down the TDS to between 90-100 ppm with a dGH and dKH of less than 1 degree.What are people using for planted tanks?
I have an RO/DI system I could use and my tap water is Very Hard (SoCal).
Should I use RO/DI and buff to what is needed, use straight tap or some sort of blend of the 2?