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Old 02-07-2010, 10:56 AM   #1
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Powder Blue Tang`s color not good

Hello, I may be overly paranoid, but I'll post this anyways just in case it's something to be concerned about.

I got two tangs 16 days ago, and they have been in a quarantine since that time. There's a PBT and a yellow tang. Both have been eating well the whole time (and they both still are) and they have been doing their fair share of trying to be the dominant one, though neither of them has really emerged as being dominant yet. I haven't seen any problems up until yesterday, when I did a 25% water change (5 gal out of 20). Later that night I noticed the PBT's color wasn't very good. This morning it was better but still noticeable. Is there anything I should be doing? Here's a picture of the PBT before:



...and here's a few of him taken this morning...







I did a 25% PWC on a different QT with a damsel in it using the same water and he seems to be doing fine, in case that matters. Thanks for your help.
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Old 02-07-2010, 11:12 AM   #2
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Update: just did a quick set of tests on the water -- here are the params:

Ammonia: 0
Nitrite: 0.15 ppm
Nitrate: 5 ppm

The nonzero nitrite reading surprises me, since this QT has been cycled for a while and I've gotten zero nitrite/ammonia readings before (about a month ago at the earliest)

This particular QT had 5 damsels in it for around 4-5 months, and cycled during that time. When I got the tangs, I put them in this 20G and moved the damsels to two 10G quarantines. The last time I took measurements was shortly after I put the tangs in the QT and I had zero of everything except for nitrates.

...so, I know how to deal with the nitrite reading (frequent PWC's). Could there be anything else going on that I should address?
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Old 02-07-2010, 12:12 PM   #3
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does with some Prime to take care of the nitrite until the bacteria catches up. PWC PWC PWC..test test test until your QT is done
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Old 02-07-2010, 12:28 PM   #4
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It is common for tangs to lose color while in qt. As long as you are doing daily water changes (should be 50% daily) I wouldn't be worried about your NO2 readings. Make sure you are siphoning out any waste and uneaten food each water change. At this point in time I hope you are performing hyposalinity or medicating and deworming.
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Old 02-07-2010, 04:38 PM   #5
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Awesome, thanks for your help. I appreciate it. I'll probably update next weekend at the latest (or sooner if something else bad happens)
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Old 02-07-2010, 04:43 PM   #6
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Hey James, there another thread where someone was asking what to use for deworming. Might as well post it here.
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Old 02-08-2010, 06:22 AM   #7
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Thought I posted this last night, but I guess not...

The blue tang looks worse. Here are more pictures:





He's still eating, but not as much as before. The yellow tang was doing a pretty good job of keeping him away from the algae, so I separated them. It's starting to look like there are white spots or something. I haven't started any medication at this point because I didn't see any need. Is there something I should be starting at this point?
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Old 02-08-2010, 09:22 AM   #8
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Clean the QT,siphon the bottom, remove the PVC parts and clean those too. Keep doing PWC's to keep water pristine. Those tangs are skittsih and will lose color when frightened.
What are you using for biological filtration in the QT?
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Old 02-08-2010, 09:34 AM   #9
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I'm doing the cleaning daily now, I'll keep up with 25-50% PWCs.

For filtration I'm using an AquaClear 30 on the 20G tank, 2 foams no carbon, inserts were recently replaced. It was cycled in this QT with 5 damsels, and I watched the cycle complete. When I got these tangs, I moved the damsels to other QTs using other filters seeded from this one -- I haven't seen any cycle problems there, though I think the bioload might have increased so maybe that explains the mini-cycle I'm having?

Up until last night I would have believed that he was losing his color due to QT stress only, but now I'm a little more worried. He's still eating, but he's not nearly as active and he's breathing rapidly. I noticed something that looked like ich (well, it looks like freshwater ich looks on freshwater fish -- I've never seen SW ich before), white spots not on his color like in the pictures. That's mainly what has me worried.

...on top of that, depending on the weather, I may not be able to make it home Tuesday night. I can stop by on the way home from work today to try and pick up some medication but at this point I would have no idea what to get.
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Old 02-08-2010, 10:46 AM   #10
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These fish are know as Ich magnets. Time to start Hyposalinty treatment in the QT.
Do you have a refarctometer? If not, get one (under $50).
Slowly bring the QT tank SG down to 1.009 over the next two days by doing PWC's with RODI water. Leave it at that SG for at least 4 weeks. You will need to do at least one PWC daily. Most important is maintaing the pH while maintaining the SG at 1.009.

Don't medicate other the PraziPro.
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