do you quarantine your new additions?

[Skimmer Juice]

If you have fish you care about QT new additions. You may get lucky by not qt your fish . I have a 10 year old puffer I would never in a million years add a fish to the tank with out full qt . I try to avoid treating fish in the qt with medication unless absolutely necessary . Prefer to try to let them get over sickness on there own . I'm guessing the people who never qt have yet to have a fish for over 5 - 10 years ? If you have a fish for that amount of time would you risk killing the fish over adding a new fish form a store? Not worth skipping the qt process. Basically I had a longhorn cowfish for 5 years grew it from a baby , I decided to add a $500 golden puffer to the tank who looked fine in the store was eating no visible signs of anything . 5 days in he wiped out every fish in my tank including the cow and the golden puffer. That was the last time I have added anything to my tank without qt .