Stocking Ideas for my monster tank

[DMD123]

As far as the dietary differences I'm well aware and was already planning on different foods for them and just intentionally feeding the Viejas first, but I certainly appreciate the input and will definitely take all of that into consideration. What are your thoughts on getting either a black or an Australian arowana for that tank as well? Or do you think it'd be too tight with the silver in there?

Sounds good in theory to feed the Viejas first but then they usually just end up overeating when it comes to feeding bichirs. Might do better switching the feeding over to night for the bichirs, after lights go out. This way they get their food and the Viejas hopefully dont over eat.

As to a Flagtail with bichirs… it may or may not work. Flagtails have been known to eat slime coats off the polys. Its said that if fed properly with enough algae based foods it tends to curb this behavior but just a possibility you may face.