I use paper towels and carpet. I am really liking that tan Zilla carpet. I hand wash it every 2 weeks, ring out the excess water and put it back into the tanks. The humidity hides get paper towels.
I use all paper towels now. They are cheap, sanitary and easy to clean. Once they poop, you rip the piece with the poop off, wipe down the area of it, then put a new sheet on top. It is also easy to amintain the UTH temp and if it gets to hot you jsut add more sheets, if it gets to cold, you take off sheets.
I saw it but from inquiries on humid box count fiber is used one of many. So should be a issue as substrate. As for gravel seen it used with them. They seems to be okay. Been almost two months now and they been fine with it. No issues there but thanks for the clarification of your opinion.