I found breeder choice kitty litter made me lazy. I'll back you up africa, I used to make astro turf and there is no similarities with marine carpet. I also found my snakes were ingesting too much kitty litter as it sticks to the rat or mouse and goes down the snakes throat with the food item, I know it's only recycled paper but what about the long run say in 5 years after eating it along with any other parasites that might be harbouring in the kitty litter. I used newspaper,it's the easiest and cheapest,we get 2 newspapers free every week which is just enough to do the job and you don't get lazy cause it may absorb the urine but it don't absorb the smell,so when a snake dumps,you clean straight away. In my small plastic tubs I don't use anything as it is easier to just wash it out. Might have to buy some marine carpet as it sounds good. I have used astr turf and it is horrible,too long and messy!