I have no idea what this is. As you can see they look like a green bubble almost plastic looking. There is about 4 of them in my tank and the first one I noticed a while ago has gotton bigger. It is about half the size of a dime. Any help would be great
Looks like its the first one on the list. I guess I should try to get it off. It says to use a sharpened screwdriver. But if I break it I'm doomed!!!!!!!!LOL Wish me luck. Wait a minute I wonder if I would be better off taken the hole rock out and removing the bubble then rinsing it with the water i take out for my water change.
You can simply pluck it off, you don't want to pop the bubble but they aren't that difficult to remove without popping. You may need to use tweezers to get the stem out.