well 10,000K is sufficient enough if you're wanting a well planted tank, with this lighting my Tiger Lotus and Ozelot Sword have been sprouting new leaves like mad.
C02 - not that essential...depends on HOW dense you want your tank
Fert - JBS fert balls are brilliant around heavy root plants
cleaning - just siphon around the plant if need be (depends on the fish you keep, some fish need cleaner water)