Relatively new to the hobby. Cycled a new tank with LR, shrimp, and snails for 8 mos before putting in first fishes (two clowns and a hypo) clowns did great hypo died. Everything was fine for almost a year then I added a long needled sea urchin and within two weeks lost everything! Didn't know anything about QT! Just ignorant, I guess, but no one at the fish store told me about it. The books I read didn't tell me about it, guess I just didn't read the right ones. Any way I have a 6 yr old autistic son who is very into marine life so I did it for him. As luck would have it I did leave the tank go at least four weeks over Thanksgiving and Christmas with just the cleaner shrimp, snails and urchin. Then I purchased fish from this website. The site was very good about exlaining acclimation, but it never mentioned QT as part of the process. It never said buy only one fish at a time. I bought a angel flame, two percula clowns, 4 chromis and a gramma along with a colt coral. Acclimated as advised to. Fish were fine for 4 weeks, then I went on vacation, left food MYSIS shrimp and Krill for my sister to give them, came back 3 chromis (the littler ones) and gramma no where to be found. Everything else looked healthy and were eating. Noticed the flame was a little pasty last night, couldn't find it this morning. When I did find it it was hiding in sand and the cleaner shrimp was on it. It has lost a lot of it's color and when I took it out of the tank and put into a bucket clear/white mucus came off it, ti's breathing is very labored and it can not keep itself upright. I have the two clown fish and chromis left. I will buy a QT tank today, now that I see from you postings how stupid it is to not have one and that each fish needs 3 weeks QT. I also learned from your "rude" postings that the hydrometer sold to me by the pet store isn't accurate enough. I have a marine testing kit and tested the water and it tested fine. So I guess I'll have to start over again, if it weren't for my son I would say forget it! So thanks for your rants, I have learned from it. Now the question is where did the ich (if it is ich there aren't any white spots on him) come from? Tank was fishless for 4+ weeks and fish coming from this site I would assume to be free of parasites, would it not? That's why I brought here rather than the pet store.