Testing Water for Hardness and Quality

Kriss BrooksFlotation Therapy1 Comment

Floatation center operators have to carefully maintain floatation tanks. After all, the heart of your business is the water in your sensory deprivation tanks. Water hardness, salt content, and quality are all important considerations for float center business owners. The water must be kept at exact specifications to ensure proper sanitation and provide an optimal floating experience. Here are some of the most important considerations that operators should remember when caring for their tanks:


Water Hardness

The level of minerals in the water determines its hardness. Floatation centers must regularly measure the calcium hardness of the water in their tanks to prevent imbalances from disturbing the environment. Most operators check water hardness before they add it back into a tank. Floatation centers use complex filtration systems to ensure each session has been sanitized and contains the right level of salinity for floating.


In the event that levels become too high or too low, center operators must add a solution to create balance. Water softeners prevent calcium buildups at high levels while adding calcium chloride will raise levels to the right level.



The temperature of the water will greatly affect the floating experience. Most tanks are fitted with built-in thermometers, but many center operators will use a more reliable thermometer to ensure the proper temperature. The target temperature for most floatation tanks is slightly lower than your basal body temperature at 93.5 degrees Fahrenheit. Some centers offer temperature fluctuations based on client preferences, so feel free to reach out to your operator if you need the water to be a little warmer or cooler.


Specific Gravity

Since the floatation tanks keep people buoyant in just inches of water, it’s important that the salinity level in the water be just right. Floatation center operators use a hydrometer to keep track of specific gravity. The instrument features a glass bulb that has been weighted on the bottom and a measurement stem. When placed in a graduated cylinder of tank water, the water level on the stem will provide the information you need. Many centers focus on keeping their specific gravity levels around 1.28 or 1.3, an indication that the salted water is denser than pure, fresh water.


For more information about tank maintenance and filtration, feel free to contact Northwest Float Center in Tacoma, Washington today. The maintenance concerns listed here are only a few of the stringent cleaning and maintenance standards that we follow to keep our clients safe. We’re more than happy to share our routine with clients for peace of mind.





One Comment on ““Testing Water for Hardness and Quality”

  1. judy wilson

    I thought the information about testing water hardness was interesting. I’ve always wondered what center operators do to make sure that the level of minerals in water is balanced. The information about how center operators add a solution to create balance in water by adding calcium chloride answered my question.

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