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ljbs 
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 Topic: White dots in tank
Posted: March 25 2012 at 7:30pm |
For the last several weeks I have noticed small write dots, about this big "O" on the rocks and walls of my tank. I don't have a good picture. They are there for several days and then seem to disappear leaving a circle behind. I get new ones often. I'm thinking eggs of some kind but I don't know which fish would lay eggs like that. The only fish I have two of are my pajama cardinals and I think they are mouth brooders. I have two or three large Mexican snails and a bunch of other snail and crabs. Any ideas on what is leaving these dots in the tank and what they might be? 
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Linda Spencer
West Jordan
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McClure
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Posted: March 25 2012 at 8:09pm |
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Those super annoying little white starfish maybe??? Are they perfectly round? Picture?
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Akira
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Posted: March 25 2012 at 8:16pm |
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Bet they are snail eggs , not sure what kind though ....
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Weberlaxplayer
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Posted: March 25 2012 at 8:28pm |
I have them in my tank, i know exactly what you are talking about, almost looks like a white sesame seed. All over the walls? Yeah, i dont know what they are either, but my tank is way healthy and nothing is happening. I am guessing your tank isnt that old. Maybe a few weeks old, or a few months. After a while they should start to disappear.
You will also commonly see white sprial circles and these guys are just common filter feeders, they are actually beneficial for your tank.
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Akira
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Posted: March 25 2012 at 9:09pm |
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Ok found a link , have you add any nerite snails recently ? After i add them the eggs began to appear, Heres a link various types of nerite snails . http://www.bing.com/images/search?q=nerite+snails&qpvt=nerite+snails&FORM=IGRE
Edited by Akira - March 25 2012 at 9:10pm
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Mark Peterson
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Posted: March 25 2012 at 10:14pm |
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Sounds to me exactly like the egg cases of Astrea snails, though other snails also lay eggs this way. A magnifying glass or even better a Jewelers Loop will let you see on the glass about 20 eggs per egg case. They typically open in 2-4 days but the baby snails don't survive.
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Akira
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Posted: March 26 2012 at 12:12am |
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Mine seem to be evenly placed and not to close together but without a jewelrs loop i have no idea
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ljbs
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Posted: March 26 2012 at 9:35am |
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Thanks everyone. My tank is actually about 5 years old, but I did recently add astrea snails. Thanks Mark for that info. I wish they would survive. I am constantly buying more snails. Thanks to Arthur I don't have to pay a fortune for them. I'll have to look more closely to see the eggs.
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Linda Spencer
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ReefdUp
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Posted: March 26 2012 at 10:02am |
I have 4 different snail egg pictures: Might help...
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www.reefdup.com
Diving since 2009, reefkeeping since 2007, & fishkeeping since 1987
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arthuriv
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Posted: March 26 2012 at 10:06am |
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They are most likely Nerite snails eggs.
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Mark Peterson
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Posted: March 26 2012 at 10:57am |
Reef'd Up did a very nice and comprehensive write-up on the snails. I'm adding that to the Reefkeeping Tips. 
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Will Spencer
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Posted: March 26 2012 at 11:46am |
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To me these look most like the Nerite Snail eggs in reef'd up's write-up, although not exactly. The dots are opaque and look to me like a very squished down cone. They only stand about 1/8 of an inch "tall" off the glass. I haven't ever seen anything like them before so I was stumped too when she had me look at them. To me it looks like the "outer shell" is calcareous, but I'm not positive on that.
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