Ozone or UV Sterilizer Question

I have read on a website that UV Sterilizers can reduce unwanted Algae, is
this true and if so, then how effective is this against the Algae?
Also, I was told a while back by a LFS that Ozone kits are effective for
reducing and/or removing Algae problems, once again, is this true and how
effective is this method against Algae problems?
Last question is that if both can do this, then which one of these methods
would be the best and safest method to use??

I have a Green Hair Algae problem in my tank that is driving me insane, I
dont have filtered fresh water to add yet so it is straight from the tap,
Yes i know that a water filter will no doubt be my best answer but at Filter
prices here in Australia, it isn't on my shopping list just yet, UV and
Ozone are way cheaper options and if they can assist me battling this Algae
untill I can afford a good Water Filter then that's ok to me.
Any help is muchly appreciated.

Thanks in advance
Microbot