There is always new science on the benefits of floating, often coming out of the Laureate Institute for Brain Research in Tulsa, OK. They post their findings on clinicalfloatation.com.
Fibromyalgia is one of those conditions that floating has a high success rate in addressing. The institute advertised a short-documentary to show the results of their studies into how floating helps this condition, but it’s an old link and it appears that it is no longer valid, so I searched youtube to find some useful information about the project, and found this video.
You can also read more about it from these float friends:
justfloat.com
truerest.com
and in articles from sources with a focus on fibromyalgia, like fedupwithfatigue.com and fibrowomen.co,
and independent takes on floating to alleviate fibromyalgia pain, like this one from medium.com.