As summer looms larger the weather heats up and things start to get a lot dryer. Areas of California, Arizona, Nevada and Texas are seeing historically severe droughts. States, counties and cities are responding by implementing drought reduction regulations. Many of these are restrictions on the draining and re-filling of pools as well as chemicals being used in the water. Below are some tips for pool professionals to help keep the water quality at its best and reduce the need of unnecessary or excessive pool draining.
According to the National Swimming Pool Foundation 50% of heat loss is due to evaporation. In warmer and dryer areas the annual rate of evaporation can be as high as 6-8 feet per year. When water evaporates only pure water leaves the pool. Hardness and TDS are increased faster when the evaporation rate is higher. Loss of water and build up of solids in the pool will lead to the need for draining and increase in chemicals. Many regulatory agencies in dry drought regions are requiring the use of a solid cover
or a liquid cover to reduce evaporation water loss.
There are now products on the market known as ‘liquid covers' which are very economical and effective. One dose can last for up to one month and provides 30 to 50% reduction of evaporation.
Manage Hardness and TDS
There are certain chemicals that will affect Calcium Hardness and Total Dissolved Solids (TDS) more than others. For example Calcium Hypochlorite leaves calcium behind in the water. During times of drought it may be advisable to avoid the use of Calcium Hypochlorite based shocks. Tri-chlor or Di-Chlor will leave behind cyanuric acid so it may be best to avoid these as well. Any form of chlorine or shock will leave solids behind in the water. While this can’t be avoided it is best to determine what may lead to a more immediate need to drain and dilute. High levels of calcium and cyanuric acid are two primary by products that can be more detrimental to overall water quality. So, a better option for shocking would be liquid chlorine or a non-chlorine oxidizer.
Keeping Phosphates Low Can Help
Phosphates are a part of TDS so if phosphates are regularly lowered then TDS build up will be reduced. Higher phosphates can lead to many water quality problems that could lead to the need for draining and more frequent backwashing. Look for a concentrated phosphate remover to deal with high phosphate levels.
Proactive Removal of Organics
Another vital way to ensure quality water is to proactively remove the build up of non-bacterial contaminants. Look for a natural clarifier for the removal of organics and suspended materials which helps keep the water clear. It also ensures that other chemicals are free to complete their intended purpose.
Remove More Add Less
In drought times the mantra needs to be “Remove More Add Less”. This refers to how the water is being treated. When using any chemical stop and ask yourself; what is this leaving behind in the water? Oxidizers, clarifiers and phosphate removers are all products that improve water quality while removing contaminants that can cause problems. Avoid over-chlorinating as much as possible. Be aware of how chemicals effect water balance too and choose chemicals that are more neutrally based. Also, avoid cleaners and metal products that contain phosphates. As a pool pro taking the time to be proactive and aware of how chemicals effect the water will help you get through drought times with minimal need for draining!
Terry Arko has more than 30 years’ experience in the swimming pool and spa industry, working in service, repair, retail sales, chemical manufacturing, customer service, sales, and product development. A certified pool operator (CPO) and CPO Instructor through the National Swimming Pool Foundation (NSPF). Arko is currently a Water Specialist for SeaKlear Pool and Spa Products. SeaKlear is a subsidiary of HaloSource Inc., a clean water technology company based in Seattle, Wash. He can be reached at firstname.lastname@example.org.