UV is a wavelenght band of light. The Wattage of light and current flow past the light are how UV's are rated. Any 25 watt unit should be able to produce enough light, with the proper flow past the light to clean up a 50 gallon tank.
Getting one on Thanksgiving might be the trick? Get one that has a quartz sleave and available replacement bulbs, they are good for a year of use.
Get one to save your fish, that's a good one.
Getting one on Thanksgiving might be the trick? Get one that has a quartz sleave and available replacement bulbs, they are good for a year of use.
Get one to save your fish, that's a good one.