1. I had those on my last set up while starting cycling. They disappeared a few days after. Seems it happens sometimes when cycling. Nothing alarming 😉

  2. Mosquito larvae or some kind of detritivour. You could have introduced them from the aquarium shop. I would thoroughly research before panicking as some organisms are completely fine – even beneficial

  3. I’m currently on day 11 of my cycle & I noticed these worms swimming in my tank.. Need help figuring out what they are. Are they harmful?

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