holding tank maintenance

Try The Geo Method to help keep your tanks clean.

Water, water and more water.

I guess that would help if you're not dumping your tanks very often, it would probably help to break down any organic matter. I can't really see spending that kind of money on something that's going to be flushed down a drain within a few days.

What I've done is add the cheapest fabric softener I can find on sale. It makes everything inside the tank slippery and adds some scent. Soap does about the same thing.

Good luck with your tanks.