Recently I started having a bit of an algae problem in my 10 gallon, and decided to get a plecostomus to tidy things up. Since Ray the Betta doesn't play well with others, I bought him a smaller tank with all the trimmings which he's warmed up to.
A few days after moving the new fish into the tank, some weird round things started showing up on the front glass. They're pretty small and hard to see... I'm certain I can't take a clear picture of them, and I'm hoping somebody might recognize them from a description.
They're either white or clear, they're all too small to tell. They appear to be attached to the glass by a short stringy appendage coming from their center. The rest of their body looks kinda like a jellyfish as far as I can tell, and it waves around with the current. There are more now than when I first noticed them a few days ago, but they don't seem to be growing anywhere but the front glass panel. Some of them seem to be clustered, while the rest are scattered about.
I'm not sure they're harmful, and don't want to do anything about them until I know what they are.
It has crossed my mind that they might be particularly clear eggs of some sort, but I don't have experience with anything like that. My residents are 6 neon tetras, one small common plecostomus, and 2 or 3 remaining glass shrimp which Ray the Betta didn't manage to eat or starve before being moved.