This is probably a dumb question but...I just got a hoya r72 filter, and tried to do a few shots tonight in my apartment. I have an aquarium with 500w of light over it, and it barely shows up with a 2 minute exposure. I tried a shot in my kitchen for 3 minutes and it looks totally black. I'm assuming that this filter is only going to work in the bright daylight? Any tips for shooting with this filter??