Upgrading tank help...

What do you have in there currently? What kind of system do you want to run on the 30 gallon? What are you overall goals for the 30 gallon? Is there a reason why you want to only upgrade in 20 gallons? Usually it's easier to keep things stable with a bit larger volume. If you're planning to upgrade, why not go a little bit bigger than just a 20 gallon difference? :)
 
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