grumpygit
Well-Known Member
Hoping for some advice please on the treatment of my stainless steel grey and black holding tanks for winterisation. Reading through various RV sites on cleaning holding tanks the consensus seems to be a cocktail of Calgon, washing machine detergent and bleach. Not knowing if these mentioned pages are for metal or just synthetic tanks, l'm not sure on the cocktail and it's probable effects on my stainless steel tanks. Any advice on the usage of these products and how long if possible for the products can be left in the tanks. Thank you in anticipation