Sahin! I'm excited for you to get this light over your tank
1) I replace each year. The T5 system in the Giesemann absolutely sucks. Don't expect anything close to what the ATI output is. Actually, when running a PAR meter a little under the water surface with 4 blue+, PAR readings are only about 200. I'm not sure if active cooling would increase output?? I'm sure individual reflectors would.
2) I run my radium 6 hours daily. I don't notice a drop off in par until about 10 months, that's when I replace.
3) 10" above water surface.
4) T5 for 10, halide for 6, and blue led strips for 12.
5) my reflector is perfectly clear, however, on my sfiligoi it was hazy. I definitely think you should polish it. I'm not sure which chemical would be best, but worth the effort I think.
6) 5 minute video
lol Soon
So, yesterday I tested po4 for the first time in a month (haven't been run gfo in 6 weeks) . You see, I have an experienced SPS keep yeah that can see phosphate levels, or so I thought
The tank showed no sign of po4 except for slower SPS growth. The test result on the Hanna low-range meter showed .21
I though it was an error so I cleaned the vials thoroughly and tested again. Result was .24 on the second test!!! I even tested with a Red Sea po4 kit and that read .18 So much for the trained eye.
I did a 20% water change yesterday and put a fresh cup of ROWA in the reactor. PO4 reading this morning was .1 Having po4 this high along with my 25ppm nitrates reminds me of thread that Thales stared about his tank and high po4.
Here are current pics with a po4 reading of .2, I prefer much lower
IMG_6654 by
rich colombo, on Flickr
IMG_6661 by
rich colombo, on Flickr