How to clean or prepare aquarium plant / moss

[octoper]

Last three week just brought Egeria densa and moss and put in my tank.

Last night when i looking at my tank found dragonfly larvae inside my tank.

[stormhawk]

As with any plants, you should quarantine them first in a separate holding tank. Insect and snail eggs are fairly common on farm-grown plants. There are occasions where there would be fish eggs deposited on the leaves of these plants, especially if the ponds they were cultivated in, contained egg laying fish like rasbora. I saw several Rasbora borapetensis in one of the concrete ponds at Teo's a long time ago. Wouldn't be surprised if some of their eggs came along with the plants.

There is also a possibility that a dragonfly/damselfly came by and laid her eggs in your tank at night, especially if it was an open-top tank.