UV does NOT have to be run 24/7. FACT It will NOT kill parasites in the aquarium water---unless they pass through the sterilizer. FACT As previously stated the green water will not come back if the cause is rectified.
Probably 75% of aquarists do not run UV and have no problems. If a tank is balanced, and maintained properly, and new acquisitions are properly quarantined there will be a very minimal amount of problems.
Using UV to try and stop problems before they arise is not good advice in my opinion. I would think eradicating the causative agent would be more advantageous than running UV continuously to mask possible future problems.
Probably 75% of aquarists do not run UV and have no problems. If a tank is balanced, and maintained properly, and new acquisitions are properly quarantined there will be a very minimal amount of problems.
Using UV to try and stop problems before they arise is not good advice in my opinion. I would think eradicating the causative agent would be more advantageous than running UV continuously to mask possible future problems.