Poop-ETA – Advanced Super Concentrate Bio-Enzymatic Microbes – Toilet and Holding tank Treatment. When Poop-ETA Is added to your toilet and black water holding tank system the good bacteria rapidly grow and multiply creating a self-sustaining ECO-SYSTEM. They start working on eating away at the organic matter (Faeces) inside your toilet system and holding tank. REDUCING – Organic WASTE, Organic SOLIDS, Organic BLOCKAGES, CRYSTALLISATION, CALCIUM, Turning it into LIQUID. Also reducing BAD ODOURS. Poop-ETA assists with keeping your toilet system working properly.