help

[seascape]

my SPS are receeding dont know why regular w/c,parameters perfect,i cant figure it out no bugs that i can see.What could it be.

 

[KathyC]

Can you please post your parameters and maybe a few pics of the corals in question?
Have you changed anything recently in the tank..any new equipment..lighting..chemcials, or a recent change in salt mixes?

 

[seascape]

parameters CA-460,MG-1290,DKH-9,PH-8.3,Nitrite-0ppm,Nitrate-0ppm
Ammonia-0ppm,salinity-1023.
now i have been doing some new light patterns trying to see what is best,for growth and color,I have a current nova extreme pro 72" lights are
agua medic 20k
420nm
75/25
454
aqua sun
460nm
imdosing kalk slow drip 24/7 but have been doing that for a long time it is also my top off.i did change to some brightweel products recently,Reef Code A/B which is calcium and alkalinity.Feeding schedule the same all i added was plankton to the diet.Did not change salt brands.I do about 20g w/c from the 180g weekly on schedule same day same time.The only corals that seem to be having problems is the SPS.the LPS and zoas are fine.using RO/DI.Vitamins i give VC,Iodine,Amino's daily suggested amount and that ive been doing along time so that has not changed.ant ideas let me know Thx RJ.

 

[KathyC]

Bump to you SPS folks..can anyone help this fellow with some ideas of what is going on in with his corals please?

 

[Killerdrgn]

temperature?
Have you been measuring your iodine levels? you might be adding in too much. The corals looks like what happens when you dip a coral in too strong of an Iodine solution.

 

[ZANYMASTER]

Clip them to save the good parts.

 

[prattreef]

How long has it taken for this to happen? i.e. has the recession been slow or rapid? If rapid, it is likely a pathogen either bacterial or viral. If it is slow it is more likely environmental like one or several of the additives you are dosing. I am not personally familiar with any of the stuff you are dosing other than iodine, but it seems like a lot of stuff to be adding to your tank.

 

[seascape]

temp constant 79 degrees,receeding slow it has stopped,Iodine just checked and they are high,im gonna do a small water change and cut back on the dosing iodine,im also going to cut back on all my dosing slowly to about 1/3 of what i was using.See how it goes.And i definately plan on clip the remaining live parts frag away,dont want to loose the whole SPS.

 

[reefman]

whats the range in your ph. i suspect unstable ca/alk. do u have a fts.
the recession looks too clean, but have you try checking for AEFW.

 

[Killerdrgn]

whats the range in your ph. i suspect unstable ca/alk. do u have a fts.
the recession looks too clean, but have you try checking for AEFW.

AEFW would leave "bite" marks in the coral. And wouldn't unstable ca/alk cause the tissue to recede very slowly?
If s/he is dosing the iodine directly into the display it could be from the high concentrations of iodine passing by the corals that are causing the stripping like in the photo's. Iodine is extremely effective in stripping flesh off corals and leaving nice white skeletons.

 

[mray]

Post a FTW. If it does not stop receding frag the dead skeleton off.

 

[reefman]

AEFW would leave "bite" marks in the coral. And wouldn't unstable ca/alk cause the tissue to recede very slowly?
If s/he is dosing the iodine directly into the display it could be from the high concentrations of iodine passing by the corals that are causing the stripping like in the photo's. Iodine is extremely effective in stripping flesh off corals and leaving nice white skeletons.

yes, slow recession(may also explain y recession stop-i.e. the par may be stable now). clean white skeleton would idicate its not aefw, but wanted to rule that out since its easy to check.
iodine unless it in large amounts or lugols, its usually pretty weak. but it can a possbility also.