CRS RO water
Im looking to get some CRS soon but I am trying to get my water right first. My tap water is as follows.
My tank water is better (using ADA AS)
So my question is how to get my GH down to around 4. Im thinking something like a 60/40 mix of RO and tap water will get me where I want to be is that correct?
Also if Im using 60% RO do I need to add any minerals or will the 40% tap water give me enough?