Not really sure what it is?

So I turned of my powerheads and my hob filter for a bit because my Condy decided to commit cuicide so I cleaned my filter and put everything back together and I got in the shower. My wife stops me when I get out and says what is this..... I look and a thousand little brown jellyfish like things ate floating in my tank. Idk what they are so I turn on my filters and powerhead and a few min later their gone. I should have taken a picture but I was worried to I though my filter would catch whatever it was. Does anyone have any idea??

 

Hydroid jellies, perhaps?

 

if they looked like little brown rockets its a type of jellyfish in larva (or baby form) cant remember the name of them though....grrrr!!!

 

Should I be worried about it?

 

If they are hydroids they should die off in time. At the very least they'll self regulate.

I wouldn't worry about them.

 

nah no need to threat.