Has the well water coming out of your tap ever smelled like rotten eggs?
If so, then you have slime-forming bacteria in your well water.
Fortunately, it’s not a danger to your health. However, it forms a layer of slime on water pipes and other surfaces it passes across such as water filters. This reduces the useful life of the filters.
It can corrode pipes, cause “rotten egg” odors, and turn the water black.
This video tells you what you need to do to counteract these bacteria in your well.