Na nesze, eppen most kaptam! :-) http://blog.makezine.com/archive/2009/06/bio-friendly_drain_cleaner.html?CMP=OTC-0D6B48984890 Ezt kell meg tudni a hozzavalokrol: http://plumbing.hardwarestore.com/51-285-septic-tank-cleaner/rid-x-septic-system-cleaner-225144.aspx Best regards, Andy