Any new fish or invert introduced to your system poses the same threat whether it is going into a 5 gallon tank or a 500 gallon tank. In fact smaller tanks are probably even more at risk due to the smaller volume which'll cause a higher concentration of anything introduced.
If you are just starting a tank, it makes sense that you need not quarentine because there is nothing to be threatened in the tank in the first place.
__________________ 90G Tall Fish Only SW (+10G Sump)
- Bluefaced Angel, Bicoloured Angel, Maroon Clown, Yellow Tang, Cleaner Wrasse, Scooter Blenny.
- Skarlet Skunk Cleaner Shrimp, Orange Spotted Purple Star, Green Brittle Star, Longspine Urchin, Bubbletip Anenome, Condy Anenome, Emerald Crab. |