Advanced super concentrated Bio - Enzymatic formula for the treatment of toilet and black/grey water holding tank system. Quickly breaks down organic waste in toilets, holding tanks and yacht drain pipes, leaving a light and pleasant pine scent (eliminates potential bad odors). This effective biodegradable formula (in addition to breaking down organic waste and toilet paper), reduces the accumulation of gas, keeping the entire toilet system always clean, deodorized and functioning. Does not damage valves and seals. Without formaldehyde. CERTIFIED BIO ECO ORGANIC DETERGENT (AIAB) - MARPOL COMPLIANT