Cooling Budget Mod for evercool WC-202. Idea? What budget parts?

I bought a wc-202 kit just over a year ago.
Yeah, it wasn't really a smart move..

Anyways, for some reason I have to refill the reservoir every week and I can't find any leak. (Quite of few reviews for KINGWIN AWC-1 on newegg.com also mentioned the same problem; AWC-1 and WC-202 look exactly the same, by the way.)

Also, the pump also seems a lilttle bit noisily for me.

So I'm trying to find a way to make the cooling kit better.
Probably think of a way to replace the current pump and reservoir..

I want to make the kit quieter and hopefully I won't need to refill it every week.

Any idea?

Thanks.