sorry so used to dealing with turtle stuff (uvb is a turtle light). I meant the uv
I had a skimmer but it stopped working months ago never got it working again. Never really needed any other filtration even when the tank was stocked. Maintained levels very well with water changes about once a month once I was well established. In my sump I try to put in some calurpa from one of my other tanks but not that often. But I have several different sponges and pads and all sorts of stuff in there.
Like I said this tank has been up and running for over 2 years now and this is new. SO I really don't feel it is much to do with the filtration or water quality.
But the light thing is something I did not think of (I probably should have b/c turtles lights are the same way).
I was thinking of getting some inverts to put in there and then take out when I get the tank more settled and add new fish. What type of inverts would you recommend to get rid of it. I will also get new bulbs hopefully between the two that will do the job. I did notice this evening that my timer had some sort of problem and the lights were on longer then I thought too so I just fixed that too so hopefully that will help too.