Safe T Sorb
Regardless of it's merits as a substrate.. I'm thinking that with my liquid rock water, STS seems to be working miracles with my PH and KH. It doesn't seem to be doing squat for GH tho.
Comparing a tank with sand, a tank with gravel, and a STS tank.
ph without StS 8.0 with 6.4
KH without STS 19.0 with 2.0
but GH was dissapointing without 32 and with 40
I may try using it in a media bag on my rack system to pull that ph down, rather like an ion "sponge"... has anyone else run into this?