I was doing a water change on the lobster tank and I forgot about the tall tree sponge. I just cut off the tips that were exposed to air! And the other small tree did die on me but it’ll be interesting to see how it this does now that I’m dosing silica. I’m up for the challenge. The yellow ball sponge is fine. Have you ever exposed a tree sponge to air by accident? Did it survive? I have to think in the ocean many of these organisms are exposed to low and high tides along with extreme swings and they survive/adapt.