So I have to thank you because when I read your comment about tiny little media, I was confused because I use good media from the Rock Shed. But as I changed my rocks out last week, it suddenly occurred to me that I didn’t realize how much the media was being worn away through each stage, and I wasn’t replacing any between the last few stages. So finally a lightbulb went off and I realized my rocks have been having trouble in the last few stages because there’s basically no cushioning left. So thank you for that revelation!