ok so let's hear it, and / or see it. What's ur ideal setup for pirahnas. What species would you most like to keep and why? And what tank size & filtration. Substrate or bare bottom. Put some thought into it but be realistic. The 2000 gallon with a 500 gallon sump and 10 fx5's just isn't going to happen for most people. But still have fun with it! 
. Ill start. I guess off the top of my head a 6ft x 4ft x 4ft with 3 fx5' or the ehiem equivalent. Those I would want seen. Maybe a black stand or stainless steel covered stand with three see threw doors to see filters lit up with leds. and moon lights for the tank also. Don't know much about lighting so ima have to skip that. As far as substrate I think id go bare bottom with maybe a pc of driftwood at most. Hella ez to clean. Species I don't really know. A rhom. Manuelli (spelling). That's just hard for me to decide on. But I would like to just keep one fish and see what I could do with it. There's mine. Let's hear yours!
. Ill start. I guess off the top of my head a 6ft x 4ft x 4ft with 3 fx5' or the ehiem equivalent. Those I would want seen. Maybe a black stand or stainless steel covered stand with three see threw doors to see filters lit up with leds. and moon lights for the tank also. Don't know much about lighting so ima have to skip that. As far as substrate I think id go bare bottom with maybe a pc of driftwood at most. Hella ez to clean. Species I don't really know. A rhom. Manuelli (spelling). That's just hard for me to decide on. But I would like to just keep one fish and see what I could do with it. There's mine. Let's hear yours!