The TPT25 tablet gives you effective protection from condensate drain and pump blockages and build up of biofilms in the drainage system. Placing one tablet in the tank pump or the units condensate drain pan, in contact with the water, and away from the drain outlet will keep drains clear.  These tablets guarantee protection from blocked condensate drains for up to 6 months.
 
Gel-clear is approved pump safe by all major manufacturers, 100% biodegradable, with no toxicity to aquatic life.