a little background info, petsmart sold me a rainbow shrk a few months ago,saying that" 20 gallons is fine for one",then i found out,that its not. after searching for tanks for a while,i found what i thought was a great deal. it wasnt. but i did get really nice lights out of it,and i found out the stuff i had too buy came with the kit i was looking at,and i would of had to replace it anyways,not feeling so ripped off anymofre. i bought some plants today(anubius and horwort) and put some java moss in too. the only fish im putting in for sure are 3-5 swordtails,and my rainbow shark. i want a male betta(id like to save one from the cups) and the fish i know for sure are going in arent nippy at all. id like a school of black skirt tetras,would they be okay with a betta? id also like either a clown pleco,a farlowella cat,or an upside down catfish, which would be better? and yes,i am fishless cycling,and using a lot of established media. id also like more plants,which kinds would you guys suggest?