20 Gal(tropical--Aqua Clear 200)
12 guppies(born 12-03)
3 white clouds
3 glowlight tetras
2 neon tetras
2 rasbora het
1 clown pleco
1 cory cat
1 rainbow shark
29 Gal(tropical--Aqua Clear 300)
3 diamond tetras
3 bleeding heart tetras
2 gold gouramis
1 platinum gourami
2 silver dollars
1 bala shark
1 albino rainbow shark
1 black fin shark
1 albino cory cat
as already said you have FAR too many fish in thoses tanks at the moment. you should NOT be considdering what else you can add to that tank, you SHOULD be thinking about how to rehome a lot of the fish you have already that are not suitable for the tanks you have.
please rehome the bala, silver dollars and the rainbow shark before you considder anything else. this is the inital problem that needs sorting but you have a lot more.