It appears as though that may have occurred with the primary channels that turned out to be rank and shady. I keep the canisters clean so not certain how it occurred. With the second arrangement of channels, the water was telling the truth and tasted fine however when I did the red color test today I found that neither one of the filters was really working. We have truly great faucet water with a tad of chlorine. I didn't identify any chlorine yet in the event that the red color is coming through, at that point, as per the Berkey site, the channels are not working appropriately. I'm thinking about to what extent this has been going on the grounds that in spite of the fact that I clean the framework routinely I haven't done the color test since I previously introduced them. Berkey water