First Tank, Filter Issue.

A quick hello and thank you for having me.

I've recently brought a 2nd hand 120L tank along with a filter. This will be my first tank set up from scratch so please bare with any questions that seem a bit daft. I've cared for tropical fish before, as my father has them, but like I say, never set a tank up myself.

 The filter is my issue, I want to clean my filter  before I start a cycle but without having a cycle complete I don't have any conditioned water.  I don't want to use tap water and kill the bacteria, if there is any. What would be the best course of action? I would like to get my tank up and running as soon as possible. I understand that the whole cycling thing is going to take a few weeks.

It was dry.
That's excellent news. Thank you.