jargonchipmunk

I'm thinking about doing my next tank as a cool water tank (70-72F)

Tank will be a 20L, canister filter, spray bar, blah blah.

I'd like to do a lower light setup this time since I have a few high lights already. I'm thinking 2-2.2wpg depending on which light setup I go with. At anyrate, I'd like to do an "island" type setup with the central mound of substrate and driftwood with mosses and anubiases possibly a stem or two behind(possibly) and maybe a nifty crypt or something from the middle of the mound. Non-traditional I know, but I'm wierd that way. Outside of the mound will be bare sand of course.

I need to know if there are any plant types that I've mentioned that'll do very poorly in cooler water, or maybe if there's one or two that will do BETTER in the cooler water that I should start off with.

Side note, my water is slightly hard. Not rocks, but it's not soft for sure.

I have the option to inject Co2 if I need to(splitter from my 20lb tank), and ferts are a given, I'll do a half-EI to start and work from there. Plant suggestions would be fabulous though, as I don't know the first thing about mosses. (or most crypts for that matter)