The items inside incubator have been autoclaved and cleaned with 70% ethanol. Today I calibrate the CO2 concentration, it showed to be 6.4% and now I have set it to 5%. So is it the CO2 level resulting in the floating problem? Or it's because of fungal contamination or something else? My project is just inhibited by this issue,sigh..
Edited by East_YYH, 24 January 2011 - 09:50 AM.