08-27-2010, 12:41 PM
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As it says in the profiles the red tailed shark needs a 4-foot tank at a minimum. A 55g is 4 feet in length and that is the smallest tank one of these fish should ever be in.
I previously mentioned that fish growth can be adversely affected by too small a space. Fish grow all their lives, unlike us, and are continually developing. Good aquarium husbandry means knowing the fish's needs throughout its life (which for these sharks can be many years if they are properly provided for) and be prepared from day one to provide what they need. If not, the fish should not be acquired.
These are lessons all good aquarists must learn. I did, and sadly I lost many fish along the way because I thought I knew better. I don't, none of us do. Only acquire fish that will suit the environment you can provide for it. Our profiles provide information on what each fish species needs to be healthy and live to its full potential. This is no more than the fish deserve.