Leather Coral
My leather coral (been in the tank for 6+ months) has been closed for at least a month now which is the longest it has done this and it's not looking the best. At first it did its usual shiny wax coating thing for a couple of days, then its lost its shine but this time the polyps didn't come out. It has also shrunk to about half its size which it did every other time it has shed.
There are only a couple of things I can think of...
My lighting was on 50% and I have increased this to 70% over the last couple of months. Its only a 70w LED so not much light anyway.
My Tiger blenny sleeps in it every night but the blenny has been doing this long before the leather closed amd never seemed to bother it.
My phosphates and nitrates are the lowest they have been in the tank since I started it. phos got to 0 on my hanna checker 2 weeks ago and my nitrates have been around 5-10 for months.
My sandbed got a light dusting of diatoms at the same time the phos got to zero, the diatoms passed in a few days.
It is in the same water flow that it has always had in the tank.
I know these corals do this but I am just checking that there isn't anything I haven't noticed ;) Everything else in the tank looks great. magnesium is 1300
Here is what it looked like a couple of months ago (just after lights on so not fully extended)
And here it is today, turning blotchy and brown
There are only a couple of things I can think of...
My lighting was on 50% and I have increased this to 70% over the last couple of months. Its only a 70w LED so not much light anyway.
My Tiger blenny sleeps in it every night but the blenny has been doing this long before the leather closed amd never seemed to bother it.
My phosphates and nitrates are the lowest they have been in the tank since I started it. phos got to 0 on my hanna checker 2 weeks ago and my nitrates have been around 5-10 for months.
My sandbed got a light dusting of diatoms at the same time the phos got to zero, the diatoms passed in a few days.
It is in the same water flow that it has always had in the tank.
I know these corals do this but I am just checking that there isn't anything I haven't noticed ;) Everything else in the tank looks great. magnesium is 1300
Here is what it looked like a couple of months ago (just after lights on so not fully extended)
And here it is today, turning blotchy and brown