There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about calculating how often you should change out, or dump, your spa water. How do you know when it’s no longer worthwhile to try to improve your spa or hot tub water using chemicals? When is it better and more cost effective to simply dump the water and start over? Use this simple formula to find out if you’re fighting a losing battle.
Formula:
Spa Volume (gal) / 3 / # of users per 24 hours = Days
Example: 2,000 gal spa with 50 users over a 24 hour period.
2,000 / 3 = 666/ 50 = 13 Days
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
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