having trouble with sps

[Tater11]

warning this may be a little long.here's what's going on we have a 375 gallon that's been up for 11 months.we have good water flow and good lighting.4 lumenarc reflectors and 4 lumatek 250/400 watt ballats.the parematers are
ca 465
alk 8.6
mag 1380
o4 0ppm hanna checker and lfs tests
no3 0 salifert
sg 1.025
temp is a little high up too 83
so far we've tried 3 sps and within a week they turn white at the base and die.
we've had great success with sps in the past but this new tank has me baffled.
any ideas?

 

[iamwrasseman]

first dont be baffled if your sps corals dont appreciate being in 83 degree water .i also would try to raise your alk to 10ish . if the tank is not brand new you could have some residule copper in it
how long are the lights on for ?
are there any "critter" in the tank that may be bothering them ? sounds like thats not going on .

 

[silentscream]

How stable is your 8.6 dkh and 465 Ca? How are you managing alkalinity and calcium depletion? 2-part or calcium reactor? In my experience, when the corals recede from the base up, its because my parameters have been jumping around.

 

[Tater11]

first dont be baffled if your sps corals dont appreciate being in 83 degree water .i also would try to raise your alk to 10ish . if the tank is not brand new you could have some residule copper in it
how long are the lights on for ?
are there any "critter" in the tank that may be bothering them ? sounds like thats not going on .

there aren't any critters that im aware of it was started with dry rock.halides are on for 10hrs a day

 

[Tater11]

How stable is your 8.6 dkh and 465 Ca? How are you managing alkalinity and calcium depletion? 2-part or calcium reactor? In my experience, when the corals recede from the base up, its because my parameters have been jumping around.

they are stable im running a ca reactor and its holding them

 

[iamwrasseman]

maybe you should cut back on the lights ,bring them down to 7 or 8 hrs and gradually bring them up to your intended time

 

[karsseboom]

Yeah 10 he's is a lot of light with those reflectors. You really should olny run them about 4-7 he's.

 

[Neoferdina]

How are you acclimating them? 83F should be that big of an issue,'though it's not ideal. I've got a bit of the same issue right now and can't quite put my finger on it.

 

[chefzif]

I would get the tank temp down to 78 to 79 max @ 80 and back down the lights to 7 to 8 hours. IMO! Chef

 

[Tater11]

Ok thanks ill try to cut back on the lighting see if that helps.and also try to get the temp down some