how to keep high alk & cal

[tboy]

is there any way to keed your alk & cal level high in a small tank like a 58g and 29g.
or what would be best for these two tank?

 

[bang guy]

What levels are you trying to maintain?

 

[tboy]

alk 10-12 dkh
cal 450-500

 

[bang guy]

That's certainly up there.
Magnesium is going to be crucial if you're trying for levels that high.
Dosing daily will help a lot. It's going to take some time to fic=gue out what the daily doses of Calcium and Bicarbonate will have to be. You'll have to keep track of levels and amount dosed.
Is this for a growout tank? Just trying to figure out why you want Calcium that high.