RDMPE - The previous owner of the halide light said that it is 6500 K, and it is about 9 months old allready, so I'm looking for a new one. I figure just to keep the 6500 in there untill it burns out, and then replace it with a 15k or 20k. I really like the blue (it illuminates my whole room, SWEET) To be honest, I can't tell a change in the temperature in the tank. Because winter came just when I got the light, my house temp was also out of wack. That, and the fact that the third heater in this tank broke, so now I am using a dinky plastic heater (which actually works).
The reason for the halogen lamp on the Freshwater is because I just don't have enough money to buy a halide light for it, and I just had this laying around, so I figured it couldn't hurt too much, right? Plus, I am not really trying for a planted FW tank, but I just got fed up with the algae all over the fake plants. I also wanted it to look more natural.
gman0526 - yeah I agree with you. I just bought the caulerpa and put it in my display for a while, untill I get a pump for the sump, which I am thinking of using a Quiet One 6000. I will have to route a lot of the water back into the sump, but whats wrong with a little extra circulation, eh

. Not sure about getting chaeto. Isn't it mpre expensive? I will check on my next visit to the LFS.
Whiskyrivr - dont worry, the outlet and ballast are on the other side than the overflow. The ballast is on two pieces of glass, and the outlet isn't too crazy yet, so I have tried to prevent a fire.