I have a 20 gallon high that is cycled and water parameters have been perfect for the last few days. I'm thinking just a pair of fish for this tank.At the moment its filtered by two sponge filters. Sandy botom and atm java moss.Ohh also RCS will be staying in this tank. My stocking ideas. 4 Scarlet Gem Badis Never kept these heard they were cool anyone have any experience with them? Other ideas Pair of GBR or Pair of Kribs( I loved them when I had them in my 55 the only problem 20 gal might be to small for them) If any room a school of ottos or a single bn wouldn't hurt either Any suggestons on pairs that would work in a 20 gallon high.