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Old 12-23-2004, 12:41 AM   #1
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Adding Iodine?

I have a Peppermint shrimp and it is suggested that iodine be added to the aquarium for proper molting. Does this hold true for all shrimps and crabs. What kind of iodine could i add. I suppose you can't use the medical variety, or can you?

Also some Corals and some Anemones require this.
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Old 12-23-2004, 01:58 AM   #2
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no it's different...
The iodine I use is clear...
They need it to molt..
my cleaner didn't molt for 2 months, I added it and 3 days later he molted..
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Old 12-23-2004, 08:01 AM   #3
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Some say water changes provide those things sufficiently. Others have said since there is no good iodine test, they have overdosed and had big trouble before. What kind, I don't know.
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Old 12-23-2004, 08:59 AM   #4
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In your case (20gal), a half a cap twice a week would be sufficient. I use Seachem Iodide
I've read that its hard to test for because its absorbed by the tank very quickly
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Old 12-23-2004, 09:51 AM   #5
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You have a 20 long, don't add anything and they'll molt just fine. Just do the regular 10% WC once a week and that's all you need for that shrimp to molt.
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Old 12-23-2004, 12:45 PM   #6
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I don't do weekly water changes.. and run SeaGel I think it's called.. So I just add it between water changes, I do bi-weekly changes so the off week is when I add my "stuff"
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Old 12-23-2004, 03:59 PM   #7
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I used to add iodine, but stopped after hearing all the bad stories about the dangers. So I stopped adding iodine about 7 months ago and my shrimps still molts every 2 to 3 weeks.
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Old 12-23-2004, 09:06 PM   #8
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Crustaceans do not require Iodine to molt. Iodine is in fact very toxic to crustaceans. They have a way of eliminating Iodine from their body though. They can store it in their exoskeleton and molt it away. Unfortunately they can only molt so often because it consumes a lot of their energy. Iodine levels above NSW levels will cause them to molt excessively and will eventually kill them.

So, if you don't want your Shrimp to live a full life you should dose Iodine to speed up its death along with most of the other crustaceans in your system.
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Old 12-24-2004, 09:28 AM   #9
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Actually, all living creatures need iodine to live, and crustaceans do need aditional iodine to molt, it is more a question of how much. Many Soft corals also need iodine to grow. The question is really not do you need to dose iodine, as much as do I have enough things that need iodine to supplement the iodine I do have.

Also, not all Iodine is clear, that actually means there is very little iodine in the mix because no matter how you make it, iodine is red. I use Lugol's solution which is that deep dark iodine we all know, and it only takes 1 or 2 drops for my 60 gallon reef. I also add this every other week and test using the Salifert test kit. The kit seems to be fine and I have very healthy and bright shrimp and corals.
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Old 12-24-2004, 10:08 AM   #10
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Quote:
Originally Posted by MadManMac
Actually, all living creatures need iodine to live, and crustaceans do need aditional iodine to molt
Yes, but above NSW levels is toxic to crustaceans. Most organisms obtain what little Iodine they require from their food, not from the water column.

No, they do not require additional Iodine to molt. The typical reef tank already has excess Iodine and adding more is putting your crustaceans in jeopardy.
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