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Bugs you might encounter in your aquarium

zozo

Member
Joined
16 Apr 2015
Messages
7,648
Location
Netherlands
to the point where I thought some kind of small fish had hitchiked in.

Yes, they do indeed swim very fish-like... I occasionally get one in the tank with feeding Daphnia i culture outdoor.
First time i saw it i thought the Oto's had fry... :) But it was a D fly larva.
 

dw1305

Expert
UKAPS Team
Joined
7 Apr 2008
Messages
11,570
Location
nr Bath
Hi all,
It's white/pale green (looks a little like a lacewing only underwater and wingless) with three or four fins on its tail and it moves fast and way more fluidly than the shrimp,
Sounds like it may be a Damselfly nymph, they are ambush predators and don't tend to swim very much, but they sort of flex from side to side.


It might be a <"swimming mayfly nymph (Baetidae)">, they are pretty rapid, but normally small and dark.

cheers Darrel
 

PotteryWalrus

Member
Joined
19 Jun 2020
Messages
43
Location
West Yorkshire
Yeah, that's it! That's it exactly! I guess I got a weird colour morph lol XDD
 

castle

Member
Joined
19 Dec 2015
Messages
637
Location
norfolk
I noticed a water mite in my aquarium very recently, pearl white. Unsure how I feel about that one, but as it's small <1mm I don't think it will do too much harm.
 

MattC

New Member
Joined
27 Jan 2021
Messages
10
Location
Portsmouth
Isn’t copper just toxic to invertebrates. At least it is for marine tanks. Expect same to be true. So if you’re keeping shrimp etc isn’t this method a not so good idea?
 

MattC

New Member
Joined
27 Jan 2021
Messages
10
Location
Portsmouth
It won’t work with steel as the degradation of copper is what makes the circuit and puts copper into solution. Possibly using a copper based treatment of some sort would do something similar.
 

Wookii

Member
Joined
13 Nov 2019
Messages
1,470
Location
Nottingham
I wonder if anyone can help me ID these bugs I found in my low tech tank this evening.

The first are a flatworm of some sort - I’m wondering if the angular head means they are Planarian?:

20BE1EFA-09FE-45BD-91CF-62994FE3BE65.jpeg

4FE14183-6DCB-4A3D-AA3C-56BCCEC224B5.jpeg


The second looks like a small crustacean or beetle. They can scurry around really fast, but don’t seem to be able to free-swim:

C1138D2C-5E4B-45F4-A764-0A3C5A5F07D1.jpeg
8A4825AD-50EA-49C7-9ED6-869793981428.jpeg
 

Wookii

Member
Joined
13 Nov 2019
Messages
1,470
Location
Nottingham
Hi all,
Definitely a Planarian, looks like it might be close to Girardia (Dugesia) tigrina, because of the eye spots. The <"second one is an Ostracod">.

cheers Darrel

Thanks Darrel.

So the Planaria need to go I assume - so Panacur at the ready.

I can’t find much information on the Ostracods and their desirability or otherwise in an aquarium - I’m all for having as much variety in fauna as possible, so are they a valuable member of the clean up crew, and of no threat to my shrimp?
 
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