hello.
i use RO water to my tank... of course my RO GH and KH are ZERO.
but to my tank. i use plants ferts..
the usually GH for my tank was 4~6 and KH was 3~4
but when my CO2 cylinder empty.. the GH and KH gone high to more than 10.
i surprized and still. i dont change water at all.
the water was 1 month old..
Anyone can tell me....
Kamel.
i use RO water to my tank... of course my RO GH and KH are ZERO.
but to my tank. i use plants ferts..
the usually GH for my tank was 4~6 and KH was 3~4
but when my CO2 cylinder empty.. the GH and KH gone high to more than 10.
i surprized and still. i dont change water at all.
the water was 1 month old..
Anyone can tell me....
Kamel.