Replacement Bio Charge Cartridges for InSinkErator Septic Disposer™ and the ISE Evolution Septic Assist™ food waste disposer. ISE Bio-Charge Cartridges are easy to replace & contains a citrus scent to help control odors from the sink drain. ISE Bio-Charge Cartridges dispense enzymes that instantly begin to break down food waste in the grind chamber, then flow into the septic tank to break down other household waste. Daily additions of Bio-Charge maintain ideal levels of bio-activity and continuously reduce septic tank sludge and surface scum.