Is any one using a DIY Ca+ reactor on a small tank? I want to build one for
use on a 30 gal tank. All the plans I find are for units that are much to
tall for my cabinet. Would like some thing about 12" tall that can run off a
small external pump like a mag drive.

Has any one experimented with non-Co2 methods of ph control in the reactor,
such as dripping muriatic or acetic acid?

John