Ugh..:confused1: So I was just wondering if anyone else has had a problem with some sort of white fungus or sumthing that looks like fungus growing on the ceramic part of the CO2 diffuser??? because i just noticed that it keeps building up and preventing my diffuser from creating the small bubbles it is suppose to. It will just give me regular size bubbles like out of an air stone with in a week or less of cleaning it. I run DIY CO2 and my water is prolly PH: 7 to 7.4. i also do a weekly water change taking 30-40% of the water out when i do my change. Im just dumbfounded because i have no clue what it is or where to start my research. thanks so much!