Using chlorine for pool sanitation and maintenance isn’t for everyone, chlorine does a great job of preventing algae and bacterial build-up, but it can also be an eye irritant for anyone spending a long time in a pool.

One alternative to chlorine is biguanides. Usually called by the brand Baquacil, it uses a hydrogen peroxide based oxidizer. It is important that you do not mix biguanides with chlorine.

Another option is Mineral Sanitation. Copper-silver ionization is brought about by electrolysis. An electric current is created through copper-silver, causing positively charged copper and silver ions to form. When copper-silver ionization is applied, positively charged copper (Cu+ and Cu2+) and silver (Ag+) ions are formed. The electrodes are placed close together and the water that is disinfected flows past the electrodes. However, you will need to maintain a modest use of chlorine.

The third alternative to using chlorine as a pool cleaning substance is Ozone Generators. Ozone gas is basically an active form of oxygen that reacts with bacteria, viruses, algae, and other impurities in the water.  At its low concentration levels in the water it has no effect on your skin and eyes.  The ozone kit is installed in the existing pool or spa filtration plumbing. There are several basic designs of ozone generators but they all inject the ozone gas into the pool water through a small tube. With an ozone system  you will still need to keep a very low level of chlorine in the pool water, but only about 20% of the normal level.