If your uv can't keep the water clear of green algae it is either broken or too small. Uv light doesn't treat the cause but it should cure the symptoms. If not there is a problem with it.
Cliff519;4323938; said:Is it a blue - green looking algae? If it is, look up pictures of cyanobactria and see if that is what you have. This stuff looks like algae, smells a little bad, but isn't really algae. The only way to get rid of this stuff is extra lighting and extra cleaning.
Brooklynella;4324894; said:This is interesting. I will post some pics when it comes back; i'm sure it will. The "Algae" is very, very green. Looks almost flourescent, and it's stringy. The entire tank goes green.
If you think about it, the diatom should work if it's algae.
My UV is 8 months old. It actually kept the algae under control for an "Extra" 3-4 days. Replacing the bulb will help, but it's obviously not solving my problem.
I have not tested for phosphates in my tap water but logically, I did not have a problem for years, then suddenly started having a problem, so it shouldn't matter.