Cat litter divider?

[Leefrogs]

I don't think that would work. It would disolve or leave resuidue in water. Here's a solution, get any kind of rock and silicone it together uthor in clumps, or a big sheet. I just gooped silicone on a plastic bag and pushed rocks into it. Cure time is 48 hours but u have to flip rocks over for other side to dry. The silicone keeps it from slipping around also. I would also give them a good wash after curing, just in case.

[bshmerlie]

Yeah I've done several tests with the cat litter concept and it doesn't hold up well with either water running over it or sitting in water. In the right scenario its great for backgrounds though.