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4 bulbs of t5 and its under a glass center brace, and a glass lid. Traditionally with my leathers I see no polyp extension when they're too high up.Looks like a very unhappy nepthia tree coral
Moderate light (yours looks bright) and medium water flow

Hard to get one without the blinds reflecting lol. Working on curtains for that. I'm going for a softie gorg only tank for this one, and with one lfs an hour away, finding leathers, let alone a solid ID even from the wholesaler these days, is tough.I have never seen a leather so ticked for so long then. Wow. My guess is something is bothering it and not allowing it to come out. I do not think that is its natural shape. Can we see a FTS?
I have had leathers stay closed for extended perriods of time due to me messing in the tank and flow not being right.
Maybe it is one I have not seen though. Very possible. I will investigate that too.![]()
I will try that out. I'm going to try raising the fixtures as well once I lengthen the power cords. I agree things look a bit tight lately as I'm adjusting to the new lights.I get the cyano issue. Been fighting it a while in my 210g too. It looks like all the gorgs and leathers are a bit closed up. My guess is the flow may be too linear. I have used gyros and mine died after a year and I will not go back. Just personal preference.
My 210g was gorg and leathers for years till I moved to new tank and now it is leathers/nems.
Flow is big. They want a wave and varied pattern. No direct flow. Some gorgs you have to be very careful where to place too. They have to have certain angles to flow, etc. Kind of a pain.
Could be you have not dialed in the best flow.
Also, if you could move the rock down to the sand for a bit, it could help. May not like the high light. Just till it begins to open up.
Gorgs: Looks like you ahve a Grubes' in there. They grow fast, but are easy anywhere in the tank really. I had mine very high in the tank. Your ribbon is the most picky and it looks okay for now. Keep an eye on algae build up. The plura is pretty flexible and seems fine where it is located.
Both the green leathers look a bit tight. I would try moving them down a bit to see if they will open up a bit.
Just some thoughts. Here are some of my gorgs and leathers (so you know what I am talking about). First picture is when the lps still had a chance. Second, all gorgs (over 14 species).

