Surface area is related to speed of any type of evap- but remember that city water is treated with chloramine and you aren't guaranteed to get it all out. Try bubbling it with an airstone, and also putting it in a warm place or in the sunlight. That should help, if anything would.

My recommendation for potting-up is spelled out in a sticky at the top of the 'basic' section called 'the importance of a continuous canopy' and the embedded link to a FAQ thread called 'why I should re-pot my plant'.

Where the heck did you find those pots? I'm looking for that EXACT pot!!! (my jealousy is eating me alive!!!)