insect nymphs in my filter?

[rsa1]

Hi,

I cleaned one of my cannister filters and found about a dozen insect nymphs in the filter material. They look very much like mayfly nymphs of some sort. At least two species, a small green one and a larger (one inch) brown one. I assume eggs came in with plants. Do I need to worry about anything? I have not seen any in the tank.

Thanks

 

[Mike Wise]

Dragonfly larvea can eat small fish, so just keep an eye out for the larger nymphs.

 

[aspen]

almost anything can come into your tank in egg or larva form when bringing in new plants. some of these things can colonise your gravel, filter or just about anywhere. i would think that just about anything that will live in your tanks will find enough to eat from food, feces, plants or even fry and fish when grown. i bleach treat all new plants.

rick