. Getting this off my chest , what you want to do is certainly possible if done correctly. First: make sure your tank is cycled and can handle addition of so many fish at once. You need to build up enough bacteria to handle this, otherwise you will end up with many dead fish due to ammonia and nitrite poisoning. Start feeding your empty tank with LR slowly every day, until you get to the point just like you would have all those fish. Once your tank can process all that food without any traces of ammonia and nitrites you're good to go. My NPS system can process 10 cubes of frozen and 200 ml. powdered food daily, so it is possible. Second: research and research more, and do a list of fish that can co exist in your 125 gal. tank long term, meaning mostly smaller fish and less aggressive. I wouldn't try to put 5 tangs and 5 angelfish for example. Third: with all the disease going around wholesalers and LFS, I strongly recommend QT, question is how are you going to be able to do so???? If not, you are asking for big trouble possibly, and losing all your fish. At the end, is this really worth the trouble? Isn't it easier just to go the proven way, take your time and stack your tank correctly ?
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