I would venture to say that a comparison is being made btwn a mouse and an elephant. The weight of waste per water ton is simply miniscule. I have no isea what the ratio is but look at it this way, how many gallons of water does a regualr water filter filter? I understand this water is much dirtier, but the filter is all that more extreme. Id say its not a concern vss the water portion. Much easier to get rid of a pound of waste vss tons upon tons of water.