well today i just got a 20 gallon tank with everything except fish and plants for christmas. my dad got me sand, and some special heat thing that goes under the gravel that helps the plants grow with it. it has already been washed and it is where it is going to be. now all we have to do is put the special heating thing and gravel on. i have already been thinking about what to put in it and i want to put some sparkling gouramis and celestial pearl danios but i dont know what else. any ideas?