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I would definitely look at a new heater. Temperature fluctuations of 5 or so degrees in that small a tank is going to eventually cause issues.
Also the bubbles could just be from where she sleeps at night. I have a few fish that sleep up near the surface, and bubbles form when they take a breath. It eventually forms something that resembles a bubble nest, but isn't.
Also the bubbles could just be from where she sleeps at night. I have a few fish that sleep up near the surface, and bubbles form when they take a breath. It eventually forms something that resembles a bubble nest, but isn't.
