Yes, you answered your own question. I personally wouldn’t be concerned. I was and am still big fan of sphagnum moss. But recently having fantastic results with natural type sponges forum Walmart. My wife suggested it (I’m a tank guy it works great). Winters are brutal dry at times in Chicago because of the furnace blasting away. I get the sponge damp and leave it on top of their hide. Refreshing every two days or so.(cleaning with f10 also as needed). Peace
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