What Is This Creature?

[Madjonny]

Oh man...

So now iv found a couple of damselfly nymphs, they're alot thinner more stick insect like than the alien in the first post...

I'm going to the LFS in the morning to pick something up and is there any fish that will go round the tank and eat anything?
I'm slightly concerned about the amount of activity in the tank before iv actually brought fish...

I'd like a fish dustbin that will just Hoover up anything, any suggestions?

 

[MBOU]

If you want to kill them all off, most fish parasite treatments will work like Waterlife Sterazin but more likely to do so still is Kusuri Discus Wormer, neither of which will harm the fish you put in but should both kill of the nymphs. That said, be cautions if you are planning to have shrimp and snails etc.

 

[daizeUK]

I would take the nymphs out and put them in a pond if you can find one.  I love to see damselflies hatching from my pond.

 

[Madjonny]

Ok that's it!

I'm going to have to kill these things...

Saw another one of the Dragonfly fly variety like the original, except this was 3x the size!
My new agassizi were doing great, then I notice this Dragonfly and my female in the same area, tried to catch it by failed... Next glance both have gone missing... Must har gone into the wood, about an hour later the female reappeared.
However she wasn't the same, she sat on the sand breathing heavily and now cannot swim straight, she will be dead very soon...
Coincidence? Or did the nymph do something to her?

Please guys I need some names of insect killer I can order ASAP... I want these bugs out!
I'm about to move my assassins to my other tank...

 

[Madjonny]

Check out this beast! I just got him out... Still going to treat the tank though, iv found too many now...

 

[haleem8777]

Yeah it look like a larvae of some sort. If it is a dragon fly larvae your fish and other creatures will be in trouble as they are apex predators and will eat fish
 

 
Does this look like the one you found if so it is a dragon fly larvae

 
 
I am not sure but dragon fly's are a protected species in Britain. so you may have to just catch and release them