I have a problem a pest jellyfish problem

[Sethdarkus]

I got thousands of hydroids in my nano and I’m having problems getting rid of them. They even survive the water pump into my refugium where I grow my pods since they got into there their numbers have sky rocketed.

[mcgyvr]

New tank?
They are usually pretty common in a new tank and their population seems to drop on its own as the tank matures..
I suppose if they are free floating then you can just strain them out with a filter sock or something if you really need to do something about it..

You sure they are hydroids? Got pictures?

[Diana A]

they will disappear in 1-2 months.

[sde1500]

I believe panacur should do the trick, though likely will kill more than just them.