LithoMan Posted September 2, 2010 Share Posted September 2, 2010 Hi All i just got a basic canister filter has a UV in it now ? do you leave UV on all the time? Also what does the UV DO ? never ever used a filter with UV any help or advice will be great CHEERS Link to comment Share on other sites More sharing options...
kcfongie Posted September 2, 2010 Share Posted September 2, 2010 Own one myself, basically, from the information i collected, it should be used when needed only. If it is one of the cheaper canisters with UV, then the plastics don't hold up very long before they get brittle. I already noticed internal wall of my canister starting to turn yellow at places where it is exposed to the light. That happened although I have used the UV for only a total of 20~30 days *(mainly for testing purposes rather than any actual need). Link to comment Share on other sites More sharing options...
fosco Posted September 3, 2010 Share Posted September 3, 2010 they kill free floating microbes - bacteria, fungi, viruses, parasites and algae but remember that they only kill or remove algae out of the water that passes through it so it wont cure disease (but it will keep white spot down when its in its floating stage before it hosts on your fish), or remove algae of any of your rocks or glass. i have one but never use it unless i have an algae bloom but with a well maintained tank with healthy fish on good food you don't really need one, they seem to be becoming a bit of a gimmick on cheap filters hope that helps Link to comment Share on other sites More sharing options...
LithoMan Posted September 3, 2010 Author Share Posted September 3, 2010 thanks guys trying to do some homework so i will turn them off and use them occasionaly Link to comment Share on other sites More sharing options...
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