Relationship Cal & Alk

[Aquattro]

Originally Posted by Namscam

what is so bad about having your Ca high aside from having low alk

If your Ca is too high, it has the possibility of suddenly precipitating out of solution. It's called a snowstorm, 'cause that's what your tank will look like.
Low alk is also a problem, in as much as alk is required to buffer pH shifts due to acids in solution.