Its not a pod but what it is 1000s of them.

They are just barely bigger then a pod on the glass. there are thousands of them and seem to be multipling! What are these things? I can e-mail bigger pics but this is the best I can do for a shrunk picture.

 

I've got a few of those things too. My best guess is that it's a hydroid in the medusa stage

 

+1 on above, Hydroid, - good picture by the way, nice close up and detailed

 

I have them covering all the glass in the tank? Will these things hurt the fish. They are very stressed and I have an ick outbreak that started when these appeared.

 

harmless hydroids.

As the tank ages they'll disappear

 

Thanks guys! I just dident know where they appeared from or what they were. They sting though? And they wont mess with the fish?

 

those are hydroids definately but not in the medusa stage. do they attack fish. im wondering that myself considering my damsel been in my tank for 2 weeks no sign of ich and then really small spots appear on it n next day gone. they are a parasite so its very well possible that the hydroids do infact attach to fish. Later on today i will b doing extensive research on the pest.

 

here hope this helps ya.

The picture depicts an example of what a hydroid colony can look like. It is also possible to see the different stages of the hydroids life cycle.

Notice how the colony consists of several genetically identical individuals called polyps. When the planula larvae have attached themselves to the substrate, the first individual grows out and starts catching food with its tentacles. The colony grows when new polyps bud off. Polyps that comprise the colony can share nutrition via the stems, and it is possible for different polyps to have different functions within the colony. In the picture above it is possible to see the feeding polyps that catch food with their poisonousness tentacles and the reproductive polyps that produce the free-swimming medusae that build either sperms or eggs.
The colony that is depicted in the picture above is about 3 cm high and the medusae are about 5 mm wide. The egg, sperm and planula larvae are smaller than 1 mm.
Hydroid colonies can vary greatly in composition. Many colonies can for example contain defensive polyps. The type of life cycle can vary between different colonies. There are hydroids that lack a colony building polyp stage, while with other specie the medusae stage is lacking.
It is the leptomedusae Obelia geniculata depicted above.

 

I have to go against the general consensus here. The pic looks like a very tiny star fish. They have 5-6 legs. I had an explosion of them in my 10 gal. once. I had literally 100s of them. LFS buddy told me to put a Harlequin Shrimp in to clean them up. It worked. They are harmless in the sense they don't bite or go after coral, however, if left unchecked, they start to attach to the coral and irritate them.

 

Very interesting! I am taking the ball and running with it! I listen to you yoda and hope for the best.