I totally agreed with you 100% and not everyone think the same. You can't stop people or advice them what not to get because they WANT it. What we can do is give them a good advice or suggestion how to care the fish.
It's true that big monster tank is always best for the fish, I 100% agreed with that but that is only 1 main reason. There are other reason is people CANT have monster tank or DONT have the space for monster tank. Then why buy the fiish? people will buy what they wanted . People always say they will upgrade tank later but never do.
What I'm trying to say is that if anyone want silver aro for their 180g we shouldnt stop that member from buying it or tell them no the tank is to small for the aor, it going to out grown the tank, you will need bigger tank?
Look around this forum closely, see how many people have small tank for monster fish. Fish doesnt grown over night.
IMO I never tell people not to get fish because they 180g or 300g is to small for the fish. If a member buy a red tail catfish for his 180g members going to tell him it will out grown the tank and it will need to upgrade soon. Well let said if he upgrade to 500g and the red tail cat eat 3feets long for sample, you going to tell him to upgrade to 1000g plus? If anyone want to own silver aro, red tail cat, or any other monster fish that can grown up to 2-3ft plus they should get a pond or pool for it?
PS...im not arguing with you bro. I just simply want to point out my low level opinion that what I think and its my 2cent. We talking or debating about fish or keeping fish it never end, people have their own opinion, thought, 2cent and it own experienced.