I run mine back to back 4 x 25w giving you 100w
When you are buying the UV make sure you buy a UVS and not a UVC
UVC are for ponds and only kill blanket weed and green water
UVS are for tanks or indoor ponds and kill the above and parasite
It's easy to tell if you have the right one
UVC has a.bulb
UVS has a tube
They must also be turned on 24/7 and the tube changed every 6 month even if the tube is still working
When you are buying the UV make sure you buy a UVS and not a UVC
UVC are for ponds and only kill blanket weed and green water
UVS are for tanks or indoor ponds and kill the above and parasite
It's easy to tell if you have the right one
UVC has a.bulb
UVS has a tube
They must also be turned on 24/7 and the tube changed every 6 month even if the tube is still working