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Ecover Toilet Cleaner Pine Fresh 750ml: Optimum level of biodegradability (OECD-test 301F, full product) Minimum impact on aquatic life (OECD-test 201 & 202, full product) Against animal testing Suitable for septic tanks Instructions for use: Squirt a small amount of Ecover Toilet Cleaner into the toilet and under the toilet rim. Leave to soak for a few minutes. If needed, scrub with the toilet brush. Flush.