Nice tanks- the glowlights and neons look particularly good together; I like the cherry barbs, tiger barbs and bichirs too. I had neons in the past (over 20 years ago!) and always found them difficult to keep, but I now think I probably didn't keep on top of nitrate levels well enough; I've had 10 glowlights for the last seven months in one of my 3' tanks (they were part of my first batch of fish when I set my tanks up again after a break of 17 years)- I might just have to move them up to the 4' tank with the Brochis and try a few neons again, but to do that I've got to find another tank for the endlers.