TP for the John

I bought two brands advertised for trailers, also a regular cheap kind and a regular expensive kind.
I put two sheets of each in individual containers and filled the containers with water. I did this on the 1st of June 2006. I agitated each often and added water when it was low.
NONE of the brands disolved or changed. They did break apart into peices about the size of a quarter due to agitation.

Do you have any experience with this? Seems to me that the filter may get blocked.

Russ