RTN

P

psteeleb

Premium Member
I got home from being out for three days and it looks like a lost a small frag to RTN. It was doing great Sunday. Does anyone have any clues as to what causes this?

I feed DT's before I left - it stunk, but no worse then normal
I decided to change my carbon tonight- as it was over due

my alk is at 9 dkh
ca was low a little low at 360
mg is low at 1110

I'm still messing with how much of the reefcentral 2 part to add daily, clearly I'm light on the mg and need to up the others slightly

with the heat lately my tank swings about 2 degrees (my chiller is out getting fixed)

I did move a rock with some mushrooms on it as they were getting stung by my anemone that decided to wander. The nem has not been in the vicinity of the coral that died, but has stung some other species. I'm actually wondering if I had a some sponge die off due to light exposure and with my carbon being old it may have caused some polutants to linger

I'll do a partial water change this weekend - it's my normal 15% every three weeks
 
all my other corals are doing great - their polyp extensions are as good as ever

one other thing that may have happened;
last weekend, I trimmed some xenia and had it in a plastic container. several hermits decided to dump over the container and the xenia went free in the tank. I have not found it but now I'm wondering if a loose piece of xenia got hung up on the coral and started the RTN or somehow killed it. The coral was completely bleached when I saw it so I'm just speculating RTN
 
Pete, Check your tank closely for red bugs, just a possibility. Mag and cal levels need to be raised.
Unfortunately RTN should be called "mystery killer of sps" no real explaination for it.
BTW what was the frag that RTNed or was bleached?
 
Robert

I'm not positive of RTN. It went from growing fine to nothing in about 3 days. I got home from a 3 day work trip and noticed it was completly white and void of any polyps. Maybe bleached wasn't the correct term but it was as clean as if it had been bleached. It looked fine prior to my departure. I remember checking it closely a few days before remembering it was coloriing up very nice. The loss was a blue milli frag I got from Tri.

I made an inspection for red bugs or just coral health a couple weeks ago, but did not see anything that concerned me. However, I didn't do a super close examination. Do you know of any signe I should look for other then just trying to find them?

Now that your mentioning it, I do have a couple corals that have changed their outward appearance over the past few months. I'll take a closer look for red bugs on these and others. The two corals I'm thinking of have gone into a growth spurt when I increased the light intensity but the base color also faded some.

thanks for the feedback.

Pete
 
@psteeleb wrote:
Robert I'm not positive of RTN. It went from growing fine to nothing in about 3 days. I got home from a 3 day work trip and noticed it was completly white and void of any polyps. Maybe bleached wasn't the correct term but it was as clean as if it had been bleached. It looked fine prior to my departure. I remember checking it closely a few days before remembering it was coloriing up very nice. The loss was a blue milli frag I got from Tri. Pete said:
I had a blue milli that rtn'd on me also after a few months in my tank. The only thing I found was that I had dosed to get my Mg up the day before...I must have moved one of my return nozzles when I had my hand in the tank because it was pointed right at the milli about 2" away from the end of the nozzle so I'm sure it got "blasted" while I was dosing to the sump return area. I attributed it to that at the time but now I don't know.
***edited for clarity***
Cheers!
Click to expand...
 
@psteeleb wrote:
that is a thought - as I was hitting the Mg dosing pretty heavy to try and bring it back up. said:
Pete,

Not sure why Mg will cause it to RTN. I dose Mg heavy and haven't had any issue. I do keep my Mg at 1540. Maybe your Mg is too low and I kept my Mg too high. It was a matter of time before it RTN.
Click to expand...
 
To clarify my statement...the Mg itself wasn't the issue, my blue milli was only 2" away from the end of the nozzle so I'm sure it got "blasted" while I was dosing to the sump return area.

Cheers!
 
that's what I was thinking. The dosing and where the flow is directed could be an issue - the sudden high dose could certainly burn the coral, more so then the actual total measurment being to high or low.
 
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