Yes, you should always dechlorinate the water before adding it to your tank... note that aging water only removes chlorine but there is still chloramine present in the water, so you still have to declorinate it.
One of the most commonly used declorination solutions is Seachem Prime, it removes chlorine and chloramines, and detoxifies ammonia too. You can get it from most LFS, usually around S$8-$10 for a 250ml bottle (that amount will treat up to 10,000 litres worth of water, so it'll last you quite a while).
Btw, 2 weeks might be too soon to fully cycle a tank. It'll be best to test your tank parameters before adding the shrimps, especially if they are CRS as those tend to be more sensitive to adverse water conditions and fluctuating parameters.
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