My 10 gallon’s heater just let out a whole stream of VERY tiny bubbles, it lasted a few minutes then stopped. It comes from that rubber bottom, from under the rubber on that. I looked it up and almost everyone’s saying that that means somethings wrong, but it’s still doing it’s job, I do lots of water changes because of a disease and the temp usually goes up to about 84 f from 80-82 f, the heater brings it back down or keeps it there. It’s done this (bubbles) for awhile, not very often but this isn’t the first time. Should I be worried? It hasn’t given any problems besides sometimes being a couple degrees off, and it’s pretty new, and few months old. I bought it new and I think it had between 4 and 5 stars. Opinions? I think it’s fine but just want to make sure. I tried getting a video but as soon as I got back to the tank the bubbles stopped.