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Blastomussa merletti going pale, not thriving

gobyvin

Non-member
Hi All,
I am stumped. I have leptastrea, acans, candy cane, chalice, hammer, easy sps, leathers, mushrooms, polyps, gorgonians, all thriving and growing. My blastos are pale and are at bottom of 180gallon Reef with little sand and three Reefbreeders 16’s running strongest at 80% for four hours of a twelve hour cycle with a longer low power start ramp and end each day. Only thing I can think of, spacing between colonies getting tight, how close should they be allowed to get? Chalice is close (1/2”) to one colony now. Other colony looks better and is 1”+ away from leptastrea up current and shrooms down current. Dead skeleton has dark algae growing in it, as heads die back this creeps in. Could this be it? Not hair algae, some micro growing in the skeleton.
Parameters are all stable for months, salinity on lower end - I know Phosphate is high, working on it. Everything else is happy though, and this is a jam packed tank (high coral biomass).
Water changes are 20 gallons a week top off RODI and Kalk. Bubble Magus DC A9 on wet skim, filter socks all changed weekly. No hair algae, coralline growing well too.
Hanna / Refractometer check 32,
Hanna Pen pH 8.0-8.2,
Hanna ALK 10.9 dKH,
Hanna Pen/digital thermometer 78,
Hanna Ca 450,
Hanna PO4 .53,
NO3 0 API.
 
How old is the blasto?
Some of my 10+ year old blasto died from old age, the frags they generated are still good.
 
Yes, many coral has limited lifespan. For SPS, it is less noticeable as they keep growing new polyps. For lps, it is more noticeable.
 
Wow Dong!
I did not expect this answer either.
Makes sense though, nothing lives forever!
They are from another hobbyists' tank, on club, and he has had these growing for many years in his tank (think might be 10+).
I have only had them in this system since May.
They have budded new heads around the bases of some of the ones receding. Maybe that is the issue?
 
What do you think of my PO4 levels just as a question, since everything else is going well, would this be something of concern?
 
For blasto, high phosphate up to 1 ppm is not an issue.
 
Wow Dong!
I did not expect this answer either.
Makes sense though, nothing lives forever!
They are from another hobbyists' tank, on club, and he has had these growing for many years in his tank (think might be 10+).
I have only had them in this system since May.
They have budded new heads around the bases of some of the ones receding. Maybe that is the issue?
Yes. The old ones dies and new ones will take over. Since there are new heads growing, I will think it is a natural process. Circle of life.
 
Yes. The old ones dies and new ones will take over. Since there are new heads growing, I will think it is a natural process. Circle of life.
Thanks Dong! Great to know! Maybe the old ones are just tired
 
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