You can use mild muriatic acid to remove clacium build up on tiles.
at a pool store..
i am not to sure about the calcium part of this, but i know that Bromine is just like clorine, you can buy the product you are looking for at a different pool store because maybe it is just your pool store that isn't selling it
To raise calcium in your pool use calcium chloride. You premix it in a container to let it dissolve and add 6lb for 10pmm in a 50,000g pool.
Stop using Calcium Chloride as your chlorination and start using tablets. Keep your pH level at 7.2 and brush the calcium deposits occasionally. There are calcium removers that you can buy at your pool supply store that will reduce the calcium in the water as well. Hatawa
If the calcium is a result of pool chemicals, draining some or all of the pool water will lower the calcium hardness level. If the cause is the fill water, commercial hardness reducers or chelating agents will bond with the calcium to keep it trapped in solution.
Low Calcium Hardness in pool water means that there is low calcium in the water and is considered "soft" and soft water tends to be corrosive. It will etch away and your plaster and any metal object the pool water touches.
Any time you like calcium is harmless
Go to the pool dealer and purchase a calcium hardness test kit.
The best way to lower calcium hardness in the pool water is to drain the water and refill with water of lower calcium hardness. Have the calcium hardness tested for both the pool water and fill water. Ideal range is 175-300ppm. There are 'calcium reducer' products available through pool stores, but not sure how effective or economical they are.
Turn the pool upside-down and knock on the bottom.
If you wanted to buy Calcium, you wouldn't even have to buy raw calcium. Just buy a gallon of milk in Acme or something.
nopee, you cannot.
google "troublefreepool" and "calcium deposits", or just go to troublefreepool.com and look for calcium information either on the forums or in "pool school". this website has the best info, and will not steer you wrong. do not rely on advice from pool stores - they are interested in selling you products you do not need, and can actually make your problems worse.