Tap + R/O mix
My water is very hard (350ppm CaCO3, 500ppm TDS) and I just ordered a 6 stage RO/DI unit. If I wanted to be able to grow soft water plants like Rotala Macrandra, what ratio would be good? I want to ideally have a GH and KH of below 4.
Something like 10/1 RO to Tap? Should I just experiment and take it from there, measuring my GH/KH along the way?
Any help is much appreciated. So much to learn!
Also, since my tank is currently filled with tap water, would my first few water changes be pure RO/DI? Or should I just stick to the ratio I come up with.
Last edited by sl3xx; 10-27-2015 at 09:57 PM.
Reason: adding second question regarding transition to RO/DI from tap water in the tank