Originally Posted by CowMoo
So 2 places say it can be in a 55 gal
+, one place says it can be in a 65 gal
+ and one place says it can be in a 170+. So what is the minimum tank.
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It depends on the size of the fish. For example: A 1" Picasso doesn't need a 170 gal
tank to grow in to start. It can be maintained in a much smaller tank for a while. However, no matter what "minimum" sized aquarium you use, eventually, it will need a large aquarium because it does get to a large size ( 8"-10") and can get more aggressive than "usual" when cramped or crowded. When will know it's time to upgrade the tank if you go small? Answer: When you start losing fish that can't be explained.
This is why you want to start with as large an aquarium as possible for these fish.
Hope this helps.