Well after learning a bit more about RO systems....
When I do change water in my tanks I use 75% RO water to get a PH rate of
about 6.8 and GH of 6-7.
But after a while (about a week) the PH value is going up a bit....
What are the factors of a PH raise it raises up to 7.2 (The hardness stays
the same ,though these too parameters as I understand are not influenced by
one another) ???
10x

gizmo