RBTA deflates every evening (like clockwork)

kozmic

New member
So about a month ago, I added an RBTA to my 24" tall 110g mixed tank, and within days, it split to become two (as I read is pretty commonly caused by the stress of a move). The other twin immediately moved and now resides on the back side of the same rock the same hight as the original. They are situated at the top of the bottom third of the tank height.

Running an Aquaticlife Edge 48" fixture on this tank, with three channels:
1) 6k (27 LEDs), reds (14 LEDs), & blues (7 LEDs) (LEDs are .5 watts each)
- Start at 7am and ramp to full on over two hours
- Ramp back down from 5pm to off at 7pm
2) 9k (27 LEDs) and 10k (33 LEDs) (LEDs are .5 watts each)
- Start at 10am and ramp to full on over two hours
- Ramp back down from 2pm to off at 4pm
3) "Lunar" blue (6 LEDs) (LEDs are .5 watts each)
- Start at 10am (this channel does not ramp up or down)
- Stop 10pm

Both the anemone in the vid below, and its twin, both deflate everyday about this same time since splitting. I am nervous that something in my conditions is causing both to stress out each day? They do re-inflate back to about the size at the start of the video within about an hour of the lights going completely off.

My params all test good with nitrates at <5ppm (or 5-10ppm at most), PO4 undetectable, 1.026, zero amm and nitrites, about 460 cal, 8.2ph, temp 77-78 degrees

Anyone with a BTA experience the same, or should I be concerned and start troubleshooting?

Thanks!

(Anemone starts deflating at about 38 sec., and the lighting is hard to discern from this time lapse... my camera was adjusting ISO and aperture automatically causing the lower and higher lighting conditions to appear the same throughout until it is only the blues...I may try again with fixed settings...)

<iframe width="560" height="315" src="https://www.youtube.com/embed/_X3udHq9Zvo" frameborder="0" allowfullscreen></iframe>
 
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Thanks...

It is funny how the longer I run marine tanks, the more jumpy I get with every small unfamiliar or potentially odd behavior I witness...
 
Another vid that shows the photo period better. Same 15 hour period... :)

<iframe width="560" height="315" src="https://www.youtube.com/embed/uC2wpBY6Q5o" frameborder="0" allowfullscreen></iframe>
 
I panic every time mine does this but it seems normal. Mine does it at least once a day, usually at night though
 
Mine disappears every night as the lights start the sunset cycle as it deflates and sucks into the crevasse behind my rock work where it's "foot" is attached

Annoys me that it hides so much but I would say it is normal with some rbta's
 
Mine disappears every night as the lights start the sunset cycle as it deflates and sucks into the crevasse behind my rock work where it's "foot" is attached

Annoys me that it hides so much but I would say it is normal with some rbta's

It's 6am here and that's what I'm currently looking at
 
Couldn't help jumping in here as I was concerned about mine doing this every night and am glad to hear it's nothing to fear. Thanks!
 
Both of mine deflate every evening at 5:30 p.m. The first time it happened I thought something was wrong...once I realized it was a recurring thing every day, I no longer worry.
 
none of my RBTA do that, my experience only bta do that will be newly imported and new to the tank do that, even then usually stop doing that after a few weeks.
 
A few weeks for one of my BTA to stop deflating daily, and 4 months for my second one. They should eventually stop after being introduced to the tank, like ClownNut said.
 
My RBTAs (4) retreat into the rocks every night once the lights go out. Been doing this for 5yrs.

<a data-flickr-embed="true" href="https://www.flickr.com/photos/152505950@N07/40066178901/in/dateposted-public/" title="IMG_1186"><img src="https://farm5.staticflickr.com/4741/40066178901_350231b637.jpg" width="500" height="281" alt="IMG_1186"></a>******** async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
 
My RBTAs (4) retreat into the rocks every night once the lights go out. Been doing this for 5yrs.

<a data-flickr-embed="true" href="https://www.flickr.com/photos/152505950@N07/40066178901/in/dateposted-public/" title="IMG_1186"><img src="https://farm5.staticflickr.com/4741/40066178901_350231b637.jpg" width="500" height="281" alt="IMG_1186"></a>******** async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

there is a big difference between retreat/closed up for the night vs deflates.
 
To be more clear, mine deflate (I'm assuming to purge waste?) and then inflate to be a smaller size during the night time. They don't close up or stay deflated.
 
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