Duncan expelling slime

[hsp]

I have a Duncan (Duncanopsammia - Toxic Green Stem Duncan Coral cluster 6cm) that extended well for the first 3 weeks after I got it. This morning it did not open and shows some slime coming from the mouth (see pics under white light).
This is a new tank—2 month, fishless cycle. I have not seen any fish bothering it, but of course my tuxedo urchin or the short spiked urchin or a snail could have bulldozed over it. I am wondering if it could be related to dosing 5 ml Flourish Phosphorus yesterday as my Phosphates were 0 (measured with Hanna ULR). This should have increased the Phosphates by less than 0.1 ppm given the 300 l tank.

Details:
Red Sea Reefer Max G2+ 300 with

• 2x ReefLED 90 at 100% Blue and 100% White for 11 hours
• Reefer DC Skimmer 300
• ReefWave 25 Gyre Powerhead at 30% during day and 10% at night
• ReefRun 5500 Return Pump at 60%
• ReefMat 500 Automatic Filter Roller
• Sump with Cheato on opposite photocycle

Stocking so far:

• few Zoa frags
• few Favia frags
• Ultra Hammer Coral 6cm
• Green Fungia Coral 2cm
• Toadstool Leather (which has not extended polyps in the last week)
• GSP

• 1 x Bicolor Blenny
• 3 x Fire Goby
• 1 x Rainfords Goby
• 2 x Orange Ocellaris Clownfish
• 1 x Pajama Cardinalfish
• 1 x Shortspine Urchin
• 5 x Astrea Turbo Snail
• 5 x Nassarius Snail
• 5 x Trochus Snail
• 2 x Strombus Snail
• 1 x Brittle Starfish

Water:

• Temp: 26 C
• Calcium: 390
• pH: 8.5
• Salinity: 1.025
• Magnesium: 1115 (target 1300, thus dosing daily 40 ml)
• Nitrates: 8.6
• Alkalinity: 7.4
• Phosphate: 0.00 (previously 0.16 and falling, thus added yesterday 5 ml Seachem Flourish Phosphorus)

Daily Dosing:

• 40 ml Magnesium (to bring up the low Mg)
• 6 ml Calcium
• 12 ml KH
• 4 ml Seachem Flourish Nitrogen

Broadcast Feeding Corals

• 2 x week: 4 ml AB+
• Daily: 1 ml Quantum Bio-Enhance
• 3x week 5 ml Phyto

 

[jabberwock]

Interesting rock. What is it made of? Duncan looks like toast...

Is this tank 2 months old? You said the cycle was 2 months. There is a lot going on if this is a 2 month old tank.

 

[Mr. Mojo Rising]

I'm sorry and I don't know what happened to it, but its on its deathbed, its about done.

I would stop the dosing and bring the tank back to baseline, thats a lot of dosing in a brand new tank. I don't even dose that into my mature tanks.

 

[hsp]

I'm sorry and I don't know what happened to it, but its on its deathbed, its about done.

I would stop the dosing and bring the tank back to baseline, thats a lot of dosing in a brand new tank. I don't even dose that into my mature tanks.

Thanks! Not planning to add much more. I will reduce dosing.

 

[hsp]

Interesting rock. What is it made of? Duncan looks like toast...

Is this tank 2 months old? You said the cycle was 2 months. There is a lot going on if this is a 2 month old tank.

I bought the rock as dry rock here in Sydney. It is some kind of concrete coloured. Quite common in the hobby here I understand.

 

[Uncle99]

Don’t like big jumps in phosphate and increasing almost .1ppm is a big jump that fast.

That being said, good for 3 weeks and then overnight to that makes me think eaten and/or, excessively bothered

Running a stable .1ppm is a good target, but slowly.

 

[hsp]

Don’t like big jumps in phosphate and increasing almost .1ppm is a big jump that fast.

Running a stable .1ppm is a good target, but slowly.

Thanks!

 

[hsp]

Update: I just measured Phosphates, and they are 0.03 (measured with Hanna ULR).

 

[Baby Damsel 219]

My snails make smile string of my Duncan coral. It is very upsetting. Looks like it caused too much stress to the coral making it blech a white/pale color. I saved mine by moving it from the light to calm down and recover.

 

[hsp]

My snails make smile string of my Duncan coral. It is very upsetting. Looks like it caused too much stress to the coral making it blech a white/pale color. I saved mine by moving it from the light to calm down and recover.

Thanks! I was thinking about inverts going over it during the night making it unhappy.

 

[Baby Damsel 219]

My zombie snails come out of the sand and ride over the Duncan coral.

 

[Baby Damsel 219]

The they leave that smile film trail.

 

[Naekuh]

I don't think that duncan is going to make it.

Also that rock looks very bad... like it has a lot of minerals you don't want.
Id run a copper test at the very least, and see if there is any traces of copper.

Also if possible id take a magnet to it, and see if you feel a slight pull for iron.

 

[hsp]

I don't think that duncan is going to make it.

Also that rock looks very bad... like it has a lot of minerals you don't want.
Id run a copper test at the very least, and see if there is any traces of copper.

Also if possible id take a magnet to it, and see if you feel a slight pull for iron.

Thanks! The rock is from the leading reef tank LFS here in Sydney. Very common here. I doubt it is bad, but I will test. Thanks!