Frogspawn Retracting

[kia_killer]

Hi, I have had a frogspawn for almost 2 years now, and in the past month it has been shrinking. It is now to the point where the skeleton is exposed and just some small polyps in the center. When I got the frogspawn it was just one head, but was doing well. It soon began thriving in my tank, and a year and a half later it had grown to 5 heads, and was doing well. My question is does anybody know or have had this happen? Where it has been doing great, and then starts going downhill? The tank specs are
40G Breeder /w 15G sump
4" Sandbed
4 T5 Actinics total 96watts on for 12 hrs
1 250w Metal Halide on for 4 hours mid day
Corallife Protein Skimmer
Phosban reactor and adsorption media (Not supposed to affect corals with the new synthetic ferric oxide formula, this has been in my tank from day 1)
UV Sterilizer

Fish
1 Maroon Clown
1 Chromis Damsel
1 Pacific blue Tang
1 Sphex Lion fish
and until yesterday a cleaner shrimp, I believe he just lived out his life. He has been in my tank since the beginning.

Other Inhabitants
Lots of Zoanthids
1 Tridacnid clam
Green Star Polyps
Colt coral
mushroom corals
Hammer Coral
octo corals
One other lps I cant remember its name. it has a cluster of heads and the heads look like grey mushrooms.
I also had a montipora that recently bleached. I dont know why it died, I couldnt find any monti eating nudis, it too was doing well and then began deteriorating.



Sump is set up for reverse daylight photosynthesis to help maintain p.h. with some live rock

Water Params
Calcium: 460-480 API Test Kit
ph: 8.3-8.4 API Test Kit
Magnesium: 1200-1400 Elos Test Kit
Alk: 9 DKH Red Sea Test Kit
Iodide: .04 Seachem Test kit
S.G.: 1.024-1.025
Phosphates: 0-0.1 Red Sea Test Kit
Nitrates: undetectable API
Nitrites: undetectable API
Ammonia: undetectable API
Temp: 77-80F
I do 5gallon water changes every 2 weeks with my own RO/DI water.
These params have been pretty much the norm for a long time as I regularly check my water and keep detailed records.

The only things really changed in the past 6 months are the
t5 bulbs and the metal halide bulb. The metal halide I changed from a 6500K to a 10K.
In the sump I set it up to have the reverse daylight and put some live rock in there for turbo snails, my tank was being overrun with baby snails.
I added 2 more wavemakers to the tank, but none of them were affecting the frogspawn. I kept it (frogspawn) in the same place, and kept water movement in the area similar to what it was before.
And about a year ago I started running carbon in the tank.

I had been using Kents Nano Reef for my dosing, but recently switched to the Tech CB.

Thats pretty much all I can think of, any help is greatly appreciated. Thanks.

 

[pakirri]

Any white dot like parasites? this happened to me and this was the cause...

 

[y0ung0ne]

I have one doing the same but no white dots and every other one in my tank is growing like weeds so will be keeping my eye on this one to see what others say.

 

[kia_killer]

Thanks for the responses. I didn't see any white spots, but I'll check again tonight. I also have what looks like cyano growing on the sand in one part of the tank where the frogspawn was, but it is a section of low water movement and I've noticed some cyano on the skeleton of the frogspawn where it retracted. Is it normal for cyano to grow in low water flow areas even if nutrients in the tank are low? When I check my ro/di water the Tds meter is reading 3, is that too high of a reading? If so I should change my filter cartidges, but there so expensive i would like to use em as long as possible. This cyano growth in this area never used to happen, so I'm wondering if it's connected..

 

[chuckbuc]

I have the aNd thing happening to my frogspawn and it has a bunch of little white dots moving around on it I thought it was just little pods or some kind of amphipod but now that pakkiri mentioned it that's what's probally causeing it to close on me .what ate they ? Will dipping the coral get rid of them there only on my froggies from what I can tell