I had issues w/ green water in my 90g and used a UV sterilizer (9W turbo twist) which cleared it up very quickly.
Later I removed it and the tank was green water-free for many months.
Recently after doing a big re-scape and disturbing the substrate a huge amount green water began to develop again. I have since re-attached the UV sterilizer (in-line) and have decided to run it continually.
I do not believe it kills any other algae than free-floating but it is also supposed to kill free-floating parasite--if you have the flow rate set such that the residence time of the water in the sterilizer is sufficient.
From reading threads here I believe many people run these continually without issue.
Good luck!
-Roy
Later I removed it and the tank was green water-free for many months.
Recently after doing a big re-scape and disturbing the substrate a huge amount green water began to develop again. I have since re-attached the UV sterilizer (in-line) and have decided to run it continually.
I do not believe it kills any other algae than free-floating but it is also supposed to kill free-floating parasite--if you have the flow rate set such that the residence time of the water in the sterilizer is sufficient.
From reading threads here I believe many people run these continually without issue.
Good luck!
-Roy
