thetford toilet chemicals

Hi Guys I am a new member with a 2 year old Ranger 19ft van. I have been using the blue chemicals in the bottom tank and the pink stuff in the flush tank and I have developed a terrible black scum in the top tank which is nearly impossible to get rid of. I read somewhere where the "experts" don't use the thetford stuff but use stuff from the supermarket. Could you please advise what to do about the scum and what to use in the future
Cheers, Bill M
Back Expand Un-Read 0 Moderator

Sponsored Links