25 gallon planted.
I'm not positive on the name of the alge. I have a little bit though. It's brown, builds up on the glass and plants. If I wipe it off the leaves of the plants, it comes off as a brown powder.
For the neons I was going to get 8 or 9 total. I was only going to buy 3 today just to see how they do. If they seem alright by Friday I'll purchase more. In my 20 gallon I have 4 neons and 3 red-eyes, they all actually school together, which I find kind of odd. I checked out a local LFS by me for the first time the other day. They had a species that looked identical to neon tetras, but only grow to half the size. I was thinking of maybe getting a dozen or so of those instead of the regular neons.
Ideally I would like one big group of schooling fish, a few cats, and some one off pairs. I prefer smaller fish, mainly because I can have more of them. Are peppered cats also called corys? I have three of them in my 20 gallon, and they don't seem to take on alge when it forms (same alge that's in this new tank).
Any suggestions are much appreciated.