what kind of media to put in my filter?

Actually you would pretty much have to scrub the gravel and dip it is bleech to really hurt the bacteria. A gravel vac won't do very much harm at all. And carbon after a couple of weeks is pretty much just biological filtration.
 
Didnt relise that with carbon, Thanks for the tip. it'll save me some cash as I'll just use filter wool for clearing up the water in future :)
 
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