Hi Folks: I use RO water in a planted tank - but having difficulties keeping
the water "harder". Tank is 54 gallons, with co2 injection.

I'm using Seachem's Equillibrium but my GH/KH readings are very low.

Any suggestions? I'm thinking of using half tap water and half RO water to
maintain a more stable carbonate hardness. What do you guys do to maintain a
more stable hardness/PH?
cheers,
Bruce