Challenge: can anyone ID this? - The Planted Tank Forum
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post #1 of 8 (permalink) Old 07-28-2016, 02:20 PM Thread Starter
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Challenge: can anyone ID this?

Hi, I have noticed a multiplying of these organisms in my tank. There are probably hundreds at this point all over the glass and substrate. They seem to eat algae and be the size of a period in this sentence. Completely black in appearance, and you only see a black dot in the tank. Today I got to look at them under a 10x magnification and higher on a microscope and I still have no idea what this is!! It looks like a microscopic water tick or something! Please help me out.
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post #2 of 8 (permalink) Old 07-28-2016, 02:23 PM
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that's what it looks like to me is a water tick, But I really have no idea.

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post #3 of 8 (permalink) Old 07-28-2016, 02:44 PM
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A form of Hydrachnidia maybe?
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post #4 of 8 (permalink) Old 07-28-2016, 10:43 PM
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Originally Posted by thedood View Post
A form of Hydrachnidia maybe?
or Limnesia
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post #5 of 8 (permalink) Old 07-29-2016, 04:25 AM Thread Starter
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So interesting that no one is 100% sure what this is. It definitely looks like some sort of water tick, but I haven't been able to find something similar online or anyone else that has this issue..
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post #6 of 8 (permalink) Old 07-29-2016, 09:41 AM
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It does look like a water mite (tick). Has 8 legs, round body, and the size fits the description so I'm pretty sure it is a mite/tick. There are so many different mites and I don't know too many of them, but I do know there are some that are fully aquatic. It may be close to Hydrozetes lacustris, or a similar genus/species that has rounded mouth/head area.

As far as I know, all aquatic mites (not all land mites) are parasites and feed on blood (so I don't think they are consuming algae), so no good news from them :P If it were me, I think I'd sterilize the whole tank they've been in. Now I may be wrong, and these guys may be harmless, but if they are problematic (may attack fish/inverts. Not even sure if some species can travel both on land and live underwater), it may be easier/less of a headache to deal with them now, rather than later (especially since they are multiplying).

Hopefully someone more certain comes along.
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post #7 of 8 (permalink) Old 05-25-2017, 05:20 AM
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I have them too! https://youtu.be/JSb_-lJhz8A

https://youtu.be/5bqBR9i5YTc

I have videos of two different ones. They aren't the best quality, but it's all I've got. They are at the very bottom of my substrate along the glass.
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post #8 of 8 (permalink) Old 05-25-2017, 05:33 AM
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Prazi time!



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