"BBC" wrote in message
.. .
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

I'll mix in tap water, as you suggest, if needed to
keep hardness and pH at a desirable level. You
can also add some crushed coral which IIRC
slowly dissolves and helps keep hardness and pH up.

Gail