calcium buildup problem

[crittergal]

I have a 30 gal tank that I am thinking of taking out of storage and setting up but it has a calcium buidup on the glass that a scrubby pad and water just will not do the job. Any ideas how I can take that stuff off the tank? Also one more question on live plants . Can you plant any species in sand or do they have to be planted in dirt or gravel. thank you for any feed back

 

[Rivercats]

Try soaking the tank in vinegar water then use good ole elbow grease and a razor blade for the hard stuff.

You can use any substrate, sand, small grained gravel, or any commercial aquatic plant substrate.