I've been using Sani-chips for my tubs. Sani-chips were recommended to me because they aren't as dusty, but LadyOhh (and others) have mentioned that sometimes the chips can get wedged up into the male's vent after breeding, and the sharp edges of the cut aspen can lead to Big Problems. I don't want Big Problems, so I've been keeping my breeding pairs on paper.

But wow, keeping tubs clean with paper is a PAIN IN THE NECK.

So what are my alternatives? What are people using for their breeding pairs? Are shredded aspen or cypress safer than the Sani-chips? Do you recommend a particular brand?