ghostsword
Member
Hi,
When should we change the 4dhk on the dropcheker? Should we do it at water change? Or not at all?
When should we change the 4dhk on the dropcheker? Should we do it at water change? Or not at all?
AFAIK DI and RO water should be totally devoid of any minerals theoretically being pure although I am new to all this so don't quote me on that 😀 Even the bottle I keep my 4dKH in has powder residue around the lid so even though I have not seen any on the DC I flush it with pure DI water hoping that if there is any it will dissolve into it and flush away.I though DI water still had a residual hardness?