sebae in trouble

[cottam411]

i have a 14 inch sebae for over a year ,metal halide lighting,no new additions,always ate silverslide one a week,for past 2 months not opening much maybe 5 inches,wont eat ,pulls in quickly when silverslide touches tenacles sooo any ideas water parameters are 1.025 calc 450 and alk is fine tempted to remove it, will it really pollute tank if it dies

 

[traveller7]

It does not sound like a goner yet to me.

Last change in lighting?
Temp swings lately?
pH shifts change lately?

Any shift in rocks around the base?
Any long term corals grow enough to reach the anemone with sweeper tentacles overnight?

Just tossing out some stuff I overlook

 

[raoul]

I wondered if it was old lights. I know ours does some funky things when our lights get old.

 

[cottam411]

lights are only 5 months old,everything else same as year ago no nearby corals also anemone is bleaching

 

[raoul]

They do pollute the tank when they die, but I don't know that it's time to do that yet. Can you post a picture of the nem, and the tank. Maybe someone will see something. You may also have some luck listing the other tank parameters.
Good luck, wish I could be more help.

 

[Amphiprion]

How often and when do you perform water changes? What additives do you use? I had a similar problem a while back. By doing a large (~50%) water change, the problem fixed itself. Larger water changes are somewhat of a last effort to save the animal, but worth trying if nothing else can be implicated.

 

[cottam411]

water changes are done weekly 5%,sorry i cant post picture dont know how i add b-ionic 2x weekly alkalinity is coloured test kit says its fine but??? are there any signs of high alkalinity i have many softies and bubbletips they all seem fine

 

[Amphiprion]

No, none of those particular animals will really display problems with high alkalinity. My anemone never flinched when I found my alk to be around 8 meq/L--stony corals were quite upset, though. Do look into the things traveller7 outlined and possibly do a large, single water change (that may eliminate some possibilities).