Water parameters:
RO from shop:
TDS 15, PH 7.0, GH <1, KH <1.
Re mineralised RO:
TDS 170, PH 7.0, GH 6-7, KH 1-2.
After 24 hrs in tank:
TDS 167, PH 7.0, GH 5-6, KH <1.
Akadama seems to be sucking some of the GH and KH up. I've read it'll do this until its 'saturated' (equalised with water...