High levels of phosphates and nitrates can consume chlorine and also help algae bloom. ![]() Evaporation of pure water from pools can also leave behind a higher concentration of TDS over time.Ĭhlorides and sulfates as TDS in your pool can cause problems such as reducing chlorine efficacy, dulling pool water clarity and allowing algae to bloom. Another TDS concern for outdoor facilities includes any lawn care or landscaping chemicals that may inadvertently find their way into the pool. ![]() Even bather-introduced contaminants such as hair care products, body lotions, deodorants, sweat, urine, etc. Virtually everything that is added to the pool contributes to an increase in the TDS value including chlorine, shock, algaecides, clarifiers, pH remediation products, etc. TDS meters are readily available and can be purchased online at very reasonable prices. For example, drinking water can have a maximum TDS value of 500 ppm according to the EPA. Freshwater swimming pools should have a maximum TDS value of around 1,500 to 2,000 ppm. Your total dissolved solids, or TDS, value is the measure of the sum of all the substances dissolved in your pool water. ![]() ![]() One of the most overlooked concepts in pool water chemistry is the measure of total dissolved solids. Do you ever wonder why your pool water may begin to look dull and not as sparkly as it once did? It might be due to your total dissolved solids.
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