UV Sterilizer??

Hey guys, SourBud here just wondering what is your guys opinion on them? Are there any good ones you guys can vouch for?

I've got 2 beautiful girls who are 6 weeks into flowering been fighting root problems for what seems like forever! I tried alot including teas, aquashield, great white...nothing seems to work well except H202 daily. Temp is not a problem, always sub 65 and no light leaks. Im just tired of buying h202 and looking for a more permanent solution. Thanks in advance!

Do you have an algae problem? UV is excellent for that,and will take care of free floating pathogens. Did you try using just plain water for a few of days? Aquatop is a good sterilizer, but it will run about $40 on Amazon, and I really don't know if it will help. What's wrong with your roots, What kind of system do you have and do the plants look healthy in general?