Mr_Altepeter;3936190; said:Why would you want to though? It seems to me that it would be easier and better for the inhabitants to just suck it up and pick up some flourite. If the issue is money then someone is in the wrong hobby. The cost of the flourite is a drop in the bucket compared to what you can and probably will wind up spending over the course of a year.
In the context of substrate for a planted tank I agree with you. Sucking it up and going for the flourite or other good substrate will make for a better tank in the end than cheap o' cat litter. Even plain soil is a better alternative over the litter imo. However I will agree with the OP, that there are times when saveing a few bucks weather it be going to home depot for some DIY supplies is indeed better and cheaper than getting the more expensive "good" stuff. I will take a couple DIY algae scrubbers any day over a sump full of high dollar ceramic bio media. The trick is knowing when to chose one route over the other.