NANO-TABS are easy to use and eliminate most of the extra maintenance problems such as odors, overflows and water damage caused by plugging condensate drains and pans. NANO-TABS are completely soluble, do not form any deposits in the pan or drain, and are safe, non-toxic, and non-corrosive. NANO-TABS clean sludge, scum and other accumulations in condensate drain pans preventing the odors caused by these accumulations. NANO-TABS can last an entire cooling season. NANO-TAB come in two different tonnage 7 ton and 20 ton.