Coarls Dieing (?)

[NewfieReef]

Can anyone tell me why this is happening to my corals.. They shrivel up and turn purple in the middle of the day!

Water Parameters are:

Salinity: 1.026
Ammonia: 0
Nitrite: 0
Nitrate: 5.0 – 10 --- I can't tell the difference
Calcium : 520
dKH: 11 or 196.9 ppm H

[MechEng99]

Those are soft corals, not SPS (the second one appears to be a Kenya tree maybe?)

Could be a variety of reasons - too much light...or the high calcium/alkalinity (higher than I like to keep anyway.)

Need more info like flow, lighting, stock list, how long the tank has been set up, etc.

[Jabrams]

what kind of light do you have?

can you take some pictures of your entire tank and sump?

trying to get a better picture of the coral, is it hard or soft to the touch?

j

[NewfieReef]

Lighting:

2 T5's - 1 6,700 K and 1 Blue Actinic 54W each
1 T12 - Super White Actinic 54W

Flow:

ow sure how you measure it, but I have two power-heads in there. Both pointed at the glass, nothing directed at the rocks or corals..

Filter:

I have a Rena XP3

Skimmer:

Aqua C Remora Hang-On Protein Skimmer - only run this from 12am at night until 7:30 am then form 9:30 am until 5pm.

Fish:

Diamond Goby
Mandarin Dragonet
Clown
2 Blue damsels
Blue Tang

Both my Mandarin and Diamond eat brine shrimp and bloodworm's.

Invertebrates:

Red Sea Star
Cleaner Shrimp

I also have a bunch of snails, and blue led crabs.

I have attached a picture from about a week ago when everything was fine....

[NewfieReef]

The tank was setup for a little more than a year, with no corals in it.... I then moved and after the water chemistry improved I started using putting in corals.