I’ve been talking to several people and from the feedback I’m getting from pros is that the new smaller media is basically the same. No difference in dissolve/melt. Melts at the same pH. No adverse affects with their tanks.Just cleaned out my reactor yesterday to refill it. Luckily, @gregg had a bag of reborn that he bought to use as rubble and I had about half a bag leftover from a year ago when I filled it. I’ve got about another year before I need to find more so I’m keeping my eyes open.
You be surprised if you Google “Coral Bones” at how close it looks to reborn. That’s what I’m gonna start using. Number 15 is a good size. Look for this bag if you can find it. A friend of mine has been using it since reborn is smaller and he likes it a lot. Says it’s the same as the old reborn. I’ll try to find their source. His LFS gets it in obviously overseas, but he doesn’t know where.