Originally Posted by redchigh
Glo-fish are actually Danios. They would prefer a neutral-alkaline ph and hardness....
Also, are you dead-set on using gravel? Play sand is super cheap, and cories love it.
I agree, once you get into it you might wish you went sand. I wish I did.
I have so many plants in my tanks and I have cories with gravel now.
They are fat and happy but I wish I had sand.
Also if I were you I would choose to get around 20 Neons and no Glo-Fish. The Neons tend to school better than the Danios and look much better when in a LARGE school like that.
Check out some videos of large school of neons. :)
For the upsidedown catfish you should have at least 5. Just make sure you don't overstock.
Have you considered a Bristlenose Pleco. You could even get an Albino one.
Have you considered plants?