Calcium and dKh dropping rapidly!

[mrhasan]

Originally Posted by asylumdown

Alk will swing way more than calcium in general, and it has a higher potential of changing over the course of a day than calcium too.

And I've never used soda ash, sounds... Complicated. You can adjust Alk using garden variety baking soda.

Yah bicarbonates are more widely used but soda ashes are coming into the light because of its potential of not getting any pH swing which bicarbonates is notoriously known for (atleast that's what I found; I am, in no means, is familiar with these chemistry).

I just checked Ca and Alk with my API and I precisely measured 5ml of water using syringe and surprise surprise; one of the marking on the test tube was way lower :P So my alk came to 7dkh and Ca came to 400ppm (maybe I missed my count last time). Found somewhere that a drop of 20ppm can result in a drop of 2dkh and that sounds right since the WC gets it to 9dKh and 420ppm. Confusing stuffs! I never thought I would have to dose this tank but..oh well!