After answering a lot of queries from people who have just had a calamity in their tank, I think I can summarize my advice in a nutshell: things you should not buy on impulse, because you visited the lfs and had money burning in your pocket.
1. exotic inverts. At very best, get the lfs to hold it while you run home and do some heavy online research. If you don't know anything about it, no matter how pretty or cool it is, it will not be attractive once it's slimed everything in your tank and died. Anemones are NOT easy to keep and require a lot of careful management.
2. fish. Same deal. Know the adult maximum size of everything you put in your tank, and if you don't know the species, ask here in reef central before you buy it. It is NOT true that fish stop growing to fit their tank. If you don't have a hundred gallon tank don't get anthias, tangs, or fullsized angels, never mind what you saw in Finding Nemo. And make sure you see your new fish eat before you buy it. Likewise---do not rush out and buy all your fish at once just because you've cycled. Every individual fish in a new tank requires a week for the tank to adapt to his bioload before you put in another. Exception: mated pairs, and small schools. Do not get another fish 'because mine looks lonely.' Fish are different. If you add another of his kind he may regard it as The Enemy.
3. additives. It may say in the ad that it cures the common cold and heals ich from afar, but again, ask online before you trustingly put it in your display tank. In general, if you don't have a test to measure how much of it there is in your water, you shouldn't be adding it to your tank. This goes for minerals and magic cures alike.
Hope that helps head some new folk off from disasters that didn't need to happen.
1. exotic inverts. At very best, get the lfs to hold it while you run home and do some heavy online research. If you don't know anything about it, no matter how pretty or cool it is, it will not be attractive once it's slimed everything in your tank and died. Anemones are NOT easy to keep and require a lot of careful management.
2. fish. Same deal. Know the adult maximum size of everything you put in your tank, and if you don't know the species, ask here in reef central before you buy it. It is NOT true that fish stop growing to fit their tank. If you don't have a hundred gallon tank don't get anthias, tangs, or fullsized angels, never mind what you saw in Finding Nemo. And make sure you see your new fish eat before you buy it. Likewise---do not rush out and buy all your fish at once just because you've cycled. Every individual fish in a new tank requires a week for the tank to adapt to his bioload before you put in another. Exception: mated pairs, and small schools. Do not get another fish 'because mine looks lonely.' Fish are different. If you add another of his kind he may regard it as The Enemy.
3. additives. It may say in the ad that it cures the common cold and heals ich from afar, but again, ask online before you trustingly put it in your display tank. In general, if you don't have a test to measure how much of it there is in your water, you shouldn't be adding it to your tank. This goes for minerals and magic cures alike.
Hope that helps head some new folk off from disasters that didn't need to happen.