I've got a 2.5 gallon with amano shrimp and 2 elusive endler's, a 5.5 betta tank with 3 white clouds, a lone leftover glass catfish that freaked in the 55, and snails, and a 10G with endler's and cherry shrimp for my small tanks.
My house is cold and the walmart jr. heater did not keep my 5.5 warm enough, so it now has a 25W heater that is great. It has a whisper 10i (I think) for filtration, as does the 10G (which has a 25W heater also).
The 2.5 gallon has the walmart jr. heater which works great and the red sea nano-filter, which I can not recommend highly enough. Best money I ever spent.
The 2.5 gallon has anubias nana, dwarf hairgrass, java moss, and some vals (which will eventually outgrow the tank). The 5.5 has melon swords, java moss, and various cuttings that I let float until they develop roots.
The 10G has some glosso (not sure if it will grow at 2 WPG), microswords, anubias nana, melon swords, crypts, and of course java moss for the endler babies.
IF you use endler's be prepared for a bigger tank. I started with a trio 6 weeks ago and I have at least 15 now.
My only thought is that I should have removed the amano from the 2.5 and put them in the 10 and put the 6 cherry shrimp in the 2.5 G so I'd have a better chance of seeing them. The amano I think would be very active in the 10G. If I can ever see all the cherry shrimp I may do that, although everything is coming down in three months for a move anyway.
Jackie