Something is wrong with my Nerite's shell

[Utar]

GH is the measure of calcium and magnesium, KH is the measure of carbonate. To be strictly accurate, KH is the measure of the buffering capacity in the water but as carbonate is the main buffer found in tap water KH is in paractice the amount of carbonate. It gets confusing as the unit is "mg/l calcium carbonate" but it isn't actually measuring calcium carbonate, just how much acid it takes to drop the pH to 4.5.

If the platies in the tank are healthy you probably have hard water as they are hard water fish. If you do have hard water, it won't be mineral deficiency.

Yep I am wrong, I looked it up again and found my mistake. Thanks Essjay

 

[Essjay]

My younger son used to work for a water testing company and he explained exactly what the tests involved