I am glad to see you are waiting with your tank!  I just got a 25 
gallon tank the other day and i only let it sit for 24h that was kind 
stupid because my fish almost died.  The reason they almost died was i 
used a chemical (very very little of it) to clean the tank and i guess 
it was still in the water.  I don't know how casue i let water sit in 
it for 2h then rinse and repeat.  but oh well it is fine now.  Also one 
thing to watch for on a new tank with new fish is watch for the water 
to turn green within a couple of hours of putting the new fish in.  
What happens sometimes is the fish begin to "nitrate" which is a 
chemical reaction  their skin does to protect themselves from something 
in the water but while they are doing this they are getting weaker and 
weaker and if you don't change the water imediatly the fish WILL die.  
i know 2 fish that react in this way for sure they are 
oscars and pirrhanna(i know it is spelled wrong)  by the way I keep 
pirrhanna and they are extremly cool fish!!!!
--- TriToss (tm) Professional 1.0 - #42
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