Haha well, a nice amount of answers to wake up to. Yeah I was thinking about the bichir eating things. The congos at my LFS are like 3 1/2 inches and fat! Maybe not all are like that. Maybe if I got the bichirs as babies and they grew up with the congos..... Ah well. Maybe I'll try. As for tank size, a 150 gal tall?!?! That sounds crazy. Don't know where I'd find that. And thanks for all the 'smaller' bichir species. That'll help me narrow it down. How fast do bichirs grow?
As for hillstream loaches, maybe a powerhead in the semi middle area? Pointed at an angle. Lots of different sizes of driftwood and quite a few big rocks?
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I have my hillstream in my 35 and have a powehead pointed right towards his territory(a driftwood pile in the middle of the tank). This is the only picture I have of the tank, but you can see the driftwood and the powerhead in the corner. Let me know if the picture doesn't work, sometimes it won't when I post from my phone.

Bichirs are pretty slow growers, but like with anything it depends on food/water quality/etc.
I think you should get the Delhezi's! I have two and love them, and they grow to be really cool looking fish.
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