Just changed the image to a 15 second exposure image taken last night.
I used every ISO for a couple of shots and this one is one I used ISO 64. I used something lower taking Sully's advice and it worked to eliminate a lot of the grain. I used 200 last time and it came out grainy but this time I'm afraid it's not much different no matter what I do. But I must say this is better than the last.
F/8.0 is the maximum my camera has so there are no other options as far as that goes.