You do realize they only grow to the size of your tank?I personally think pacu, rtc, tsn, arapaima, etc etc should be banned from sale. Esp paima though. Unless you have something that's 10000+ gallons you have no business owning one.
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All sarcasm aside, I think it's a slippery slope banning sales if you want those who can afford to do so to own them. They can't go straight into a 1000000+ gallon tank at the size most are sold at. So you have the allow people with "plans" to buy them. Once you start banning things, they're hard to get back.
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