Boost GH (general hardness) if lower than comfort zone
General hardness is mostly made up of magnesium and calcium. These mineral support the general health of our fish. Too low of content, and our fish exhibit scale loss and rotting fins. Water too rich in general hardness can poison our fish. Boost GH if high by adding Epsom salts. Epsom salts are magnesium in it’s purest form. In most parts of the world, magnesium is scarce
Calcium is a common chemical. In most cases when GH is low, magnesium is low. If magnesium is too high, it must be removed by adding water that has been stripped of all value. The process is called reverse osmosis; R.O. water. Be warned. Adding R.O. water may lower GH, but it will also lower KH as well
Measuring water parameters
Goldfish suffering from magnesium poisoning exhibit violet to purple tail fins. Sooner or later these fish will suffer organ failure unless treated
The comfort zone is for GH is 200 to 400 ppm