This one honestly seems like the best one. Massive tanks tend to have massive fish, it's too common almost. Seeing a huge tank with that much fish in it would be pretty awesome. There'd be something new to see everyday with potential pairs breeding and whatnot.
I worked at a lfs and had a couple do that actually. It's is pretty cool haha
Almost all pikes are hyper aggressive, but that is because they are piscivores who instinctually attack other fish for food. Only a few dwarf pikes are "peaceful". If you get pike, their tankmates need to be as large or larger than them at all stages of age.
I like this too. Tons of activity, lots of colors and little risk of deaths with the calmer SAs. You could easily do 3-4 different species groups of geos with severum, festivum and angels in the upper levels. Uaru, chocolates, oscars and Aequidens acaras are good options too.
