Yes, it does seem that you have a filter pad with a small amount of GAC
(charcoal) inside. When you rinse the new pad does black water and dust come out? That would be GAC
dust from shipping and settling.
Did the tank come with that filter or did the lfs
sell it you seperately from the tank?
You have an LED
light. Who makes and what model is it? Is it designed for an aquarium?
's are the hot new thing in aquarium lighting. You can get the same PAR as MH
lights without the heat. LEDs last for years while MH
bulbs need to be replaced every year. Like anything else there are great brands, some that will do and some that are pure junk.
I just switched from a combo MH
fixture to LED
's. I bought on the high end but love it. I'm hoping this is my last light fixture for the next 5 years or I hit the lottery and get that 2500 gallon tank going <lol>.