funny you ask ...just back from town and grabbed a bag of kitty litter , it has only clay , the size of the granules looks fine . it was not that easy to find !
there's everything out there , grass , paper , lots of clumping , organic and gluten free ! Next step will be testing the granules to see if they dissolve .
if they don't , I'm thinking about setting up an anoxic basket in a small test tank and see how it evolve in regard of ammonia , nitrite , nitrate , ph
using household ammonia as in the start of a fishes cycle ...safety first , the gang is happy and I don't want to mess with that