Hi All,
I'm currently using a comercial additive when making up RO for water changes, this gives (1g per 10l):
K 10mg/l
Ca 13mg/l
Mg 3mg/l
Cl 3mg/l
TDS 75ppm
gH 2.5°
kH 0.0°
Has anyone used a formula for mixing up their own? I've got quite a few salts for EI, could I use these?