3 friend's experience with 6th Avenue.
1. A well established 240g fish only tank with quarantine tank. Saw the biggest ocean caught Percula with excellent black between the white bars. Quarantined the fish for 2 weeks and then introduced it to his 240g display tank and within a few days both Ich and Odium showed up on the 6th Avenue fish. Couldn't catch him out, so had to treat the entire 240g instead and within days, all other clownfishes caught both Ich and Odium. All died within days and then spread to all the Tangs within the tank. Continual treatment, but all Tangs died and then spread to all Angelfishes, and all his Angelfishes died as well. Total wipeout of all clownfishes, tangs and angelfishes.
2. Bought a nice large Emperor Angelfish from 6th Avenue and by next morning it died within their quarantine tank. Went back to talke to the owner and he said, no warranties or credit. The Emperor came from their display tank, not a Sunday special and it was there for 3 days and was eating very well.
3. A lawnmower blenny was purchased at a Sunday lot special and introduced into an established reef tank... mistake! The lawnmower blenny brought Ich into a tank that has never had Ich. The blenny didn't make it, but Ich to this day still remains in the tank and shows up on the other fishes from time to time.
Sad stories. Buy your mystery wrasses elsewhere.