This will also vary a great deal from season to season and from pool to pool. An average inground swimming pool in an average year used by an average pool owner will need to budget about $300 in chemicals for a season (based on a 16’x32’ inground). If the pool is using a salt system, that number will most likely be a little bit lower.
We need to breakdown our chemicals into three categories.
Regular Schedule Chemicals - Sanitizers
These are the products that kill bacteria and neutralize organic wastes in the water. They will be either chlorine, bromine or salt, that works with a salt water system to generate chlorine in the pool.
Depending on exactly what setup you have for your swimming pool, these are tasks that you do either Daily, Weekly or once every 2 weeks.
Water Balancing Chemicals and Products
Water has several factors that we need to adjust to a certain range in order to make our sanitizers work. These factors are things such as Total Alkalinity, pH, Calcium Hardness, Cyanuric Acid, Phosphorous and Total Dissolved Solids. As complicated as all of that seems, we are simply trying to bring the levels of each of those factors to a certain ideal level that will allow our chlorine or bromine to actually work and keep the water clean.
We normally test the water early in the season and make the needed adjustments by using a variety of balancing chemicals and then we are done. There might be a need to re-balance mid season, especially if we’ve had a lot of rain or we’ve had to add a lot of water to the pool to make up for splashing and evaporation. But these products are only added after we test and see an actual need for them.
Chemicals to Fix Problem Water
The last group of chemicals are only needed when we encounter a specific problem with the water. An example of this would be green water caused by algae. There are algaecides that are added to kill the algae and return the pool to clean, clear water. Sometimes, and this is mostly for pool owners that use water from a well. There might be too much metal in the water. Copper is a common example. In that case we add a product to eliminate the copper, or reduce the negative effects such staining.
If you did the right kind of preventative work with the first 2 categories, an inground swimming pool will rarely need any ‘fixing’ products from the last group.
Swimming Pool Cost Series
For more information, have a look at all related posts about swimming pool costs: