Any idea why it is losing tissue? Maybe because of my Kessil light? It has been in the same spot for over 6 months with no issue but when you said “move it to a dark spot” it kinda made me wonder if that could be why it’s losing tissue. All my water parameters look good so I’m just not sure what action to take, if any. I want to try to save it if possible but I definitely don’t want to throw everything else off in the process.
Many sponges just simply don't do well long term. They are filter feeders and filter something specific but their specific diets per species are not well known. Now it might be worth trying to move it to see if light is the issue, but don't beat yourself up over it.
Sorry, I didn't read that part of the original post! The new light COULD be the cause, but it's more likely that some minor parameter has shifted to a range that the sponge doesn't like. They wax & wane all the time in my tank, but they always come back. As for an ID, I've got no clue. I do have the same thing in my tank though., it's growing underneath a Lithophyllon.
