Vip
Smily this!
I think you should re-think what you are doing. Its easy to get the pond and filter system for it because you can just use a pool filter, but 150 oscars = alot of deaths, even with 12000g its going to br cramped due to the amount of breed that will be going on. If you are for real about doing it then i would only buy 6 oscars and wait till they pair up and have babies, but whatch out they lay upto 600 eggs each batch and thats were the fighting will begin. Why dont you go for more agressive cichlids? if i had something like that i would have to say Peackock Bass and Jaguar Cichlids are my first choice.