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See attached images. I've had this 70-gallon tank for 5+ years and never seen this before. I have not added anything new to the tank in the last year or so and, in general, nothing has changed recently. I started seeing this a few weeks ago and didn't look very closely. I thought it was food...

I have a 70 gallon freshwater tank. As of four weeks ago, I had 2 Denison/Roseline barbs (7+ years old each), 2 Australian Rainbow Fish, 10 Neon Tetras, 6 Lyretail guppies, and 1 catfish. Four weeks back, one of the barbs managed to jump out of a small opening in the back of the tank. My dog...

Hi, I've had a Fluval 406 for just over a year now.  It worked great and was dead silent up until around 3 months ago when I noticed a mild humming noise.  The noise has been consistent for the past three months, but it is annoying.  I took apart the impeller and did not find any debris.  I have...

Hi, I was hoping to get some advice/information/suggestions regarding my contemplated upgrade. I currently have a 29 gallon freshwater glass tank with an AquaClear 70 Gallon Power Filter, one heater (I think the heater is made for up to a 60 gallon tank), and a fluorescent light. I would like to...