I enjoyed keeping them. The only reason I had to rehome mine was because I left my country. If I had the opportunity to buy them here in Dubai I most certainly would. Unfortunately what is sold here as Piranha are Red belly Pacu. And there are a lot of them sadly.Thanks for the replies. Exodons are amazing but I really like the overall look of rbp’s. Im gonna try find someone locally who has them and see can i have a look at their set up and make my judgement to weather or not to get them. Would you say they are rewarding overall to keep? I have a 120 gallon so was thinking of a school of 4-6?
What I would try if I was in your situation would be to get as large a group as is possible for your tank of RBP's (as young as possible too) and add some silver dollars in with them. They look similar (when young), and are from the same family and environment, but are more active than the RBP. This should give a nice, interesting mix in your aquarium. I am by no means an expert so I am happy to be corrected if I am wrong, but it think the RBP and SD should loosely stick together, without the RBP giving them much trouble.
You would need some seriously good filtration though. Extra canister filters or a sump.