I have a filtration system consisting of an air injection filter, brine softener, cotton yarn, carbon and carbon filters. I have all of this because I have high levels of iron in my well. This was evident from the brown stains in my showers and toilets. This parameter alone (iron is the third row in the table) should differ greatly between "good" and "injection, fabric softener, cotton, etc." Picture. It hasn't changed a bit. Seeing this, I decided to expand the testing. I only tested the blower air filter. SUCH. I tested the water in a pond. for all parameters for all samples. Each sample was immersed for 2 seconds, held horizontally, excess water shaken off and photographed 30 seconds after immersion. Not a drop difference. A picture says more than a thousand words, see for yourself and save money. Btw I didn't even bother with bacteria tests as they have conflicting color indicators on the bottle, in the paper instructions and in the description here.
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