If you are keeping your aquarium outside your house, one thing you should take care is that your aquarium should have a proper covering. One of the main reasons for having a proper covering is due to dragon flies. Most dragon flies lay their eggs in water .You might have seen dragon flies jumping in and out of your aquarium touching the surface of the water, if you are having a fish pond outside. Actually these dragon flies are laying their eggs by doing so. When these eggs hatch there is every chance that the larvae attack the small baby fishes in the aquarium for their food. Baby fishes of guppies and swordtails are very small by birth which makes them ideal prey for these dragon fly larvae. So it’s always good to have a covering on top of your aquarium if you are having one outside. This will prevent dragon flies and other unwanted insects from interacting with the aquarium.