You really need to cycle the tank fist. As said above the water will do absolutely nothing for your cycle.
I would also warn against putting 2 clownfish in a 10g, and especially an anenome. They require tanks that have been set up for awhile and have pristine water. Also it will require intense light, your t5 depending on which ones you got might not be able to sustain one.
Letting your tank run now should be fine, just don't put any fishin until your cycle completes.