Overview
- Test strips have long been the go-to testing method for pool and spa owners—and for good reason. The dry chemistries used in these strips are as reliable as those in our liquid reagents, and testing couldn’t be easier. Just dip into a collected sample and read-no technical know-how required. Within seconds you’ll have a good picture of the condition of the water and whether or not any adjustments are necessary. Less time spent testing means more time for enjoying your pool or spa.
  
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Properties

Details

Analyte	System	Method/Chemistry	Standard/Equivalance or Description	Comparator	Cell
Bromine, Total	sureCHECK comparator	OT	1, 2, 4, 6, 10 ppm bromine (Br₂)	9781	NA
pH w/ acid/base demand	sureCHECK comparator	Phenol red	6.8, 7.2, 7.5, 7.8, 8.2	9781	NA
Chlorine, Total	sureCHECK comparator	OT	.5, 1, 2, 3, 5 ppm chlorine (Cl₂)	9781	NA
Alkalinity, Total	Drop test	Blended indicator	1 drop = 10 ppm total alkalinity as CaCO₃	NA	4034

Storage

All reagents have a shelf life, whether they are liquids, powders, crystals, tablets, or test-strip pads. If kept dry, powders and crystals are very stable; acids are also long lived. Date of manufacture is not the controlling factor when it comes to shelf life-storage conditions are more important. As with all perishables, reagents are sensitive to environmental influences and will last longer under controlled conditions.

To this end, we recommend:
• Storing reagents at a consistent temperature in the range if 36°-85°F (2°-29°C); extreme temperature fluctuation, say from a refrigerator to a hot car trunk, causes reagents to deteriorate.
• Keeping them out of prolonged direct sunlight. (Note: their brown plastic bottles help protect very light-sensitive reagents.)
• Segregating reagents from containers of treatment chemicals.
• Replacing caps immediately and tightening them carefully so that exposure to air and humidity is limited.
• Avoiding switching bottle caps, placing bottle caps on soiled surfaces, repouring reagents into contaminated containers, or touching test strip pads.

We formulate reagents to remain effective for at least one year, with only very few exceptions (molybdenum indicator in liquid form is one; after four months old it should be tested against a standard periodically). As a general precaution, replace all reagents more than one year old, or at the beginning of a new testing season.

Research Field

Market: Pool/Spa

* For research use only.

Applications

Application

Residential

Application Description

Test Parameter	Description
High halogen level may change indicator reaction from green/red to blue/yellow; to prevent, add thiosulfate prior to testing.	Total Alkalinity
Sanitizer levels > approx. 10 ppm may cause a blue-purple color resulting in false high readings. Wait for sanitizer level to decrease to normal levels and retest to assure an accurate reading.	pH
Iron > 10 ppm may cause negative interference.	pH