Ron,
I remember Liquid Plumr came out with a product that you pour down the drain to clean out the trap and pipes. It was a bio-type of product. The commercial on TV showed how it naturally ate away at the 'colesterol' on the pipes. As for holding tanks, there is a product that I use called K.O. Can be found at WM. There is a link on our site that talks about sanitation maintenance and the use of bio products that manage odor.
Roc-
I remember Liquid Plumr came out with a product that you pour down the drain to clean out the trap and pipes. It was a bio-type of product. The commercial on TV showed how it naturally ate away at the 'colesterol' on the pipes. As for holding tanks, there is a product that I use called K.O. Can be found at WM. There is a link on our site that talks about sanitation maintenance and the use of bio products that manage odor.
Roc-