Get a good filteration system going, maybe an UGF and a power filter to, like a pengiun 170 "has a bio wheel set up"
go with your lemons, 5 of them, a couple corys of your liking, maybe a 5 neons,
or 5 and 5 of some other tetra type fishses you like if your not sure about them, should about limit your tank.
"Dave Hate Me Dave"