I have some new long-fin white clouds and have a problem I haven't seen before.
Three fish have developed what look like a single small "bubble" on their lower lips.
It's the strangest thing. Doesn't look like columnaris, the "bubbles" are in identical locations,seem like perfectly smooth surface, and they are too large to be ick. They almost look see-through (I can't tell for certain because the white clouds move so darn fast, ditto with why I can't get a photo of the things)!
Water parameters are fine, checked with API test kit, this is a very heavily planted QT tank.
Any thoughts? Anyone have experience with something similar?