Originally Posted By: sprkplug
I will readily admit to being completely ignorant about such things, but I would never have imagined that up to 30% of filtration could occur simply due to contact between the water and the sides of the tank. Wow.


Also any plumbing that makes contact with the water will have bacteria growing on it.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.