Aiptasia?

Hope it's not. It's super tiny sticking on the tank glass. The background is a K3 power head.

I cant tell if thats an aiptasia or hydroid jelly.

But either way, is it bad? If so, what's a safe way to remove it? Thanks.

If its the jellies,then they tand to just go away on their own and dont cause any problems.If its aiptasia,then you'll need to kill it with something like Aiptasia X or Joe's Juice.
If you can wipe it off the glass with no effort,then its the jellies.

I'd just pull it off with some tweezers.

Yea, I'm not going to take the chance. I just used an air tube and created a siphon to try to suck it out. It hung on tight. I then used the tube edge to scape it and it kinda got cut in half and the tiny tentacles (or whatever they are) got sucked out immediately. Scraped it a few more times and got the root out as well. I believe the siphon should have got every of its little parts sucked out since they are so tiny.

You'll know pretty soon if it was an aiptasia, because where there's one there's some! Keep an eye out for them and get 'em before they have a chance to 'take off."

I'd lean towards Hydroid on this one, based on shape, color, and the fact that it's on the glass. Aips can grow on the glass (I've seen it once in my fuge) but it's very unlikely that you would see them on glass first without them being in your LR. Hydroids almost always show up on the glass first. If you see more pop up, I would go with Yote on this one and say just leave them. They will disappear on their own.

Just found another one, but this one is 1000x bigger (compare to the one I first saw on the glass. It's in the fuge (a 5g home depot bucket). Easier to identify now. Should I use a tube to try to suck it out while scrape it?

If you do try to remove it, make sure that you have suction over it before you try to scrape it, if it is an aip, it will release spore as soon as you start messing with it and you'll end up with them everywhere.