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  #1  
Old 01/05/2008, 04:13 PM
dcombs44 dcombs44 is offline
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Location: Springfield, IL
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Salinity Change and RBTA

I have an RBTA that I've had for around 2 weeks. All has been well until 2 nights ago. My top off switch failed and flooded my sump. I was able to pump most of the fresh RO/DI water out before it mixed with the salt.

The salinity still dropped in my tank from 1.025 to 1.022 or so.
I've been slowly bringing it back up the last 2 days with my top off water. it is now at 1.024 sg.

The tank has been set up for 1.5 years, with Live Rock that has been in one of my tanks for over 3 years.

I run 250 watt 14k MH 10 hours a day.

I did a water test today on all params that I have tests for. See below.

pH: 8.2
NO2: 0
NO3: 0
NH3/NH4: .25 ppm (My test is off. It even tests fresh RO/DI from various sources at .25)
PO4: <.1 ppt
Ca: 360 (Need to bring this up a bit, but shouldn't affect the nem)
dkH: 8.3
Temp: 81
sg: Between 1.023 and 1.024

Any thoughts on if my nem will recover from this drop in salinity, or should I be worried at all?


Here's a picture on a normal day.



Here's today. (I wasn't fully extended yesterday either, but it did accept a piece of shrimp soaked in vitachem)



  #2  
Old 01/05/2008, 05:28 PM
SPARTAN VI SPARTAN VI is offline
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It actually looks like it has more zooxanthellae in the last three pictures (maybe heatlhier); unless your first picture is just over exposed. My RBTA get's stringy/inflated throughout the week (perhaps even more often). I stopped worrying about seeing my RBTA deflated.

It spent an entire evening like this once:


then the next morning:
  #3  
Old 01/05/2008, 05:47 PM
dcombs44 dcombs44 is offline
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Here's another pic around 4:40pm today.

  #4  
Old 01/05/2008, 06:02 PM
J.R.L. J.R.L. is offline
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my GBTA does that every now and then also...usually when its excreeting waste or what-not....but i have noticed any quick changes in specific gravity will make it look like it does in the above picture
  #5  
Old 01/05/2008, 06:16 PM
norwall norwall is offline
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Location: ingleside,il
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Yeah, I wouldn't worry about it too much they change there shape quite a bit sometimes. Just slowly raise the salinity again and let the clock tick. Time going by.....it will recover.
  #6  
Old 01/08/2008, 07:03 PM
SPARTAN VI SPARTAN VI is offline
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How's it looking today?
  #7  
Old 01/09/2008, 01:11 AM
dcombs44 dcombs44 is offline
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It's seemed to have bounced back nicely.

It continues to look lighter when it's stretched out, and darker when it's deflated, but it's still got plenty of xooxanthellae.

Do you think it will grow more and color up better when it's stretched out?
  #8  
Old 01/09/2008, 02:02 AM
hybridgenius hybridgenius is offline
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Join Date: Nov 2007
Location: Boston
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Usually when it stretches out like that, then its reaching for either 1.food or 2.light. This is normal behavior and I doubt that salinity change was drastic enough to even affect it. It looks pretty good. You should worry when it deflates and looks pale. Other than that, beautiful rbta.
 

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