what chemicals to use?

[reef4ever]

what is the essentials to be adding to the nano?

[DRC69]

Nothing - Just do water changes.
A few gallons every other week or so.
Save your money for good salt and a RO unit if you don't already have one.

[reef4ever]

sera sea salt or tropic marine?

[DRC69]

IO or Oceanic is good. I think tropic marine cost waaaaaay to much.
SeaChem is also very good.
I blend IO and Oceanic together for what I think is a great salt.
But I also have 6 tanks going, 90,40,two 10's,12 and a new 24.
The two 10's I'm breacking-down in the next two weeks or less.
Everything is going into the new 24 and 40.
Do you have an RO unit????

[reef4ever]

yea i got an ro. but of course.

[DRC69]

Cool then you are all set.