Wish to ask if anyone knows how to distinguish these 2 powders.
I suppose adding a kh solution into seawater, u would see "clouds" forming but not Ca. Am i right on this?
I was mixing my kh powder, saw some white "cappucino" forming at surface & looks weird so use a dropper n put some into my tank. No "cloud" form.
If kh does form clouds n not Ca, then i would suppose the label on the container is wrong.