LOGIN

RSS Facebook Twitter YouTube
GLOSSARY       

SEARCHGLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

PROFILESEARCH

Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





 

Minimum search word length is 4 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
One Nasty-ass Aquarium Bug
October 28, 2008
10:50 pm
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

Okay...

Deviating slightly from my other post about a new tank setup, unfortunately I've lost a few of my fish after just a few days. I've gotten used to fish dying somewhat, though it's still distressing.

I did a partial water change yesterday, and am doing one right now. The nitrate and nitrite levels are low (20 mg/l nitrate, 0 mg/l nitrite), and the pH is slightly acidic. I've removed all the dead fish and some dead foliage, as well as some fungus-like stuff that accumulated under a coconut shell.
I also added some medicine to the water before starting the water change; I'm not exactly sure if it's worked, but my last catfish standing has become more lively again.

Then I came across this nasty thing:

[Image Can Not Be Found]

I have no idea what it is, or how it got in there, but I got it out of the tank as soon as I could. I can't help thinking it had some kind of role to play.

Any ideas?

Attached files

[Image Can Not Be Found]

October 29, 2008
12:50 am
Avatar
mickthefish
Veteran
Forum Posts: 830
Member Since:
June 24, 2008
sp_UserOfflineSmall Offline

it looks very much like some kind of dragonfly nymph, they do predate on fish and suck all the fluids from the fish, destroy it mate.

mick

October 29, 2008
1:35 am
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

QUOTE (mickthefish @ Oct 29 2008, 01:33 AM) < {POST_SNAPBACK}>
it looks very much like some kind of dragonfly nymph, they do predate on fish and suck all the fluids from the fish, destroy it mate.

mick

I flushed that thing down the toilet, only because I don't have my lighter on me.

I just hope there isn't any more of them.

October 29, 2008
12:34 pm
Avatar
Mark Duffill
Community Helper
Forum Posts: 1012
Member Since:
August 12, 2008
sp_UserOfflineSmall Offline

I would agree with Mick, there are two types of dragonfly larvae, the short bodies which you have and the longer bodied larvae that has 3 small spikes/hairs at the tail end.

I have had dragonfly larvae in my tanks before and they can do some real damage, unfortunately they usually come in on plants and where there is one there will usually be a couple more.

Keep an eye on the base area of any plants or edges of any rock work, if they are moving around you will eventually spot them.

October 29, 2008
2:09 pm
Avatar
Malti
Community Helper
Forum Posts: 1099
Member Since:
May 13, 2008
sp_UserOfflineSmall Offline

yep thats a dragon nymph, they're dangerous to small fish usually

October 29, 2008
2:10 pm
Avatar
Matt
Málaga, Spain
Admin
Forum Posts: 8239
Member Since:
June 13, 2011
sp_UserOfflineSmall Offline

Evil little buggers. I had one come in on the filamentous algae Manuel gave me actually. I'm on the second floor so must admit I just chucked it straight out the window when I spotted it. /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" />

Sorry to hear about your fish. What were the symptoms?

Cake or death?
October 29, 2008
2:12 pm
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

I'll definitely keep an eye out for these things... if I find any more I won't be nearly as merciful to them. I've lost at least eight fish to it in just a few days.

Ironically I searched the net last night for ways of getting rid of them. All I found were message boards with people saying what delightful creatures they were.

October 29, 2008
2:18 pm
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

QUOTE (Matt @ Oct 29 2008, 02:53 PM) < {POST_SNAPBACK}>
Sorry to hear about your fish. What were the symptoms?

The first fish I'd lost were in the smaller tank: this was back when I had six rasboras, a betta and two shrimp.
One of the shrimp and my first betta fish went after separate water changes, where they decomposed. (For the betta I'd used RO water.)
My second betta fish and a rasbora probably went because of bad water quality - it was hard to keep a tank of that size clean for long.
Four of the rasboras and a shrimp went "missing". I suspect the betta fish were responsible for that.

October 29, 2008
11:29 pm
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

Update for you fellow aquarists...

I got home and checked on the tank first thing. Everything looked okay, until I spotted a fallen tetra after noticing one was missing.

I'd spent the next few minutes searching the tank for more dragonfly larvae. Initially I was looking for the same kind as I'd found before.
Just when I was about to give up, I'd somehow spotted the other larvae kind (long body, three "spikes" at the back). Immediately I got my gravel cleaner and tried to suck it up, but I'm sure it escaped.

I decided there was only one thing to do...

I stripped out all the [probably egg-ridden] plants and - except for the moss balls - threw them in the bin. It was a good chance to get rid of the dead foliage too! Then I transferred all of the small fish to the spare small tank, only leaving the obedient hatchets.

I used my oversized net to disturb the gravel, and netted any flushed out larvae. They blended right in with the gravel, being a light brown colour and only distinguishable by its long body. The hatchets were very cooperative, moving to the opposite end of the tank as I progressed.

As I began taking out ornaments, bogwood and rocks, as expected, more larvae came out of hiding. Once I got used to their movement they were easy to catch, though one almost escaped.

In total there were five of these long-bodied things, all of which got a dignified send-off (read: cremation with lighter fluid and rubbing alcohol).

I sure hope there's no room for unexpected surprises, but I don't know what else to do to be rid of them once and for all.

November 24, 2008
3:02 pm
Avatar
dunc
Admin
Forum Posts: 1323
Member Since:
June 7, 2011
sp_UserOfflineSmall Offline

That's horrible Drew. Sounds like you did well to get rid - is your tank in the clear now?

November 24, 2008
5:20 pm
Avatar
Headdy
Member
Forum Posts: 48
Member Since:
March 15, 2008
sp_UserOfflineSmall Offline

QUOTE (dunc @ Nov 24 2008, 03:45 PM) < {POST_SNAPBACK}>
That's horrible Drew. Sounds like you did well to get rid - is your tank in the clear now?

There were a few more losses afterwards (one rainbowfish, the last catfish and a tetra), probably due to the water quality in the other tank. Thankfully, though, there hasn't been any more losses since.

Forum Timezone: Europe/Paris

Most Users Ever Online: 246

Currently Online:
1 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Devices in use: Desktop (1)

Top Posters:

Stefan: 1567

Plaamoo: 1256

mikev: 1134

Malti: 1099

Mark Duffill: 1012

Member Stats:

Guest Posters: 0

Members: 30498

Moderators: 0

Admins: 2

Forum Stats:

Groups: 4

Forums: 10

Topics: 4603

Posts: 36639

Newest Members: RoyC, Gilbert Fox, Gremlin, fishkeepers.pcriot.com, Rapture

Administrators: dunc: 1323, Matt: 8239