I have been reading up on communal fish diseases and have found some pretty concrete findings that protozoa like ICH are inherent in most fish from LFS due to breeding and keeping habits... this could be argued for decades i am sure. but more to the point. I would like to implement a column filter that uses an LED UV canister to help kill off any livelinesses in the water column. As for now this would be implemented on a quarantine tank (for fish with the ichs) it would suck the water from the column, and put it back in the intake tank of the filter housing. I have a PVC idea in place with drilled out holes for the LED's and some baffling/filtering media inside to both slow water rates and trap gunks.

**EDIT** The water i get from our LFS is RO/DI/UV treted already. so i know they have something inplace for the local flora/fauna. This should also help to keep algae down in high light tanks.

any one built filters/housings before?
Thoughts?

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When you pay that cash or swipe that card you are making a bond with that animal that you will treat it with love and respect, and its needs will be met, first and foremost (unless you have kids...) I don't care if you have to eat ramen noodles or nothing at all to feed your cat dog fish rat whatever. That's the bond you made! Life is precious!

Remember for the UV to kill the Ich it needs a low flow of water and the UV shouldn't be run on a tank 24/7 365 days a year.