Hydroid Jellyfish

It only took a few searches to find out what these little guys were. At first I thought they were something still in perhaps a larva stage, But, soon found out that they were in fact Hydroid Jellyfish. The reason I decided to create this thread was see if anyone has had any negative effects from these little guys. The thought of Jelly fish in a tank is a bit unsettling, but, Everything I've red so far says they are harmless, and possibly the sign of a healthy system? Any input is greatly appreciated in advance.

 

I have found that they tend to die off after the tank has aged.

Just like most hydroids they thrive on fine suspended particles (food) in the water column. Sometimes you may get a new appearance of them, usually from new micro algae or rocks.

 

I agree,i've had them and found them to be harmless and fairly short lived.It's the colonial hydroids that can become an issue.

 

Are those the "Browns" that I've red about? I saw the photos of them and they almost look like aptasia, but Apts are in the anemone family right? I'm almost under the impression that anemone and jellyfish aren't too far apart in the underwater world....

 

Yes,i believe so.Luckily,i've never dealt with them,but from threads on here i've seen many times where they can become a nuisance.

 

Colonial usually show up in patches and do look similar to an aiptasia.

If colonial and not solitary on the glass you can take a piece of epoxy and cover them for a week or so and they will die off.

Usually decreasing feeding helps as well.