Cleaning calcium build up

[lukep77]

Hey I was wondering if any one has any tips on cleaning, calcium build up off of a glass tank.

I know it would take a lot of scrubbing, and lots of elbow grease.
But is the a product that I could put on there to disolve the calcuim.
I was thinking CLR, but I think that would be too harsh, and not a good idea on the inside of the tank.
I have heard that vinager would work, but to be carefull on the glass.

So any hints sugestions are all wewlcome,

Thanks L