Jump to content

Water Balance: Ph, KH, GH


Recommended Posts

Hi all,


I am trying to assess my water balance to determine if I need corrective action.  It seems my Ph is on the low side and KH and GH are not quite in sync with each other.  I live in Tucson, AZ where the tap water is VERY hard, so I use RO for water exchanges and top offs.  Fish (4 Denison's, 1 Congo Tetra, 1 Gold bristle nose Pleco - 60 gal tank) seem to be doing fine, plants look like they could be a bit more vibrant.

Any advice is greatly appreciated.

Here are my water parameters from the Tank, Tap and RO:


Ph = 6.4
KH = 4 dKH
GH = 8 dGH
Nitrite = 0 ppm
Nitrate = 5 ppm
Ammonia = 0-0.25 ppm
CO2 = 35-40 ppm


Ph = 8.0
KH = 6 dKH
GH = 17-18 dGH


Ph = 7.0
KH = 0 dKH
GH = 0 dGH


Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...