Nano owners help me out....

[Mr Cob]

Ok, I'm getting another pair of Onyx Clowns from GCReef this weekend (Thanks, Bill and Dr Mark).... and I want to insure they live this time.

-I have an 8 gal BioCube macro tank (been set up for like 6-9 months)
-stock everything
-need to add a small heater
-also have frozen mini mysis stocked up for them

Here's the tank:



Tell me what you would do to keep things stable....

Add an air pump?
Remove the stock bio stuff/carbon and replace with live rock?
Water change 10%-25%/week?
SG?
Add a heater?

PS: I have no problem taking it back to the basics....talk to me like I'm a newbie....things didn't work out the last time so I want to cross my "t's" and dot my "i's".

I'm seriously thinking about just adding the clowns to the main display (144) from the get go where they will have 3 anemones to choose from.