Mineral blocks
roy hunter (103707.2451 at compuserve.com)
09 Jul 96 00:09:05 EDT
The mineral blocks I use come from a company called HBH in Utah. They were
designed for use in salt water aquariums. The do not contain any magneisum by
the way so the GH is all calcium. A fine product at a reasonable price ( about
33 cents ea and they last for about a month)
Roy