Who Gives A Fish Forums

It's not a hard and fast rule, more of a personal choice. I've never had a quarantine tank, and to be honest, it's worked out okay for me so far. I did have a bit of a scare with an ICH outbreak when I first set the tank up, but that was with the initial fish, so I wouldn't have quarantined them ...

17 litres is classed as a pico tank. I'd recommend searching the forums or Google for what's suitable, but a hermit crab could work. For tropical marine tanks, you'll need a heater, but not for coldwater ones. However, coldwater setups are less common and might require a chiller, which is quite ...