Hello, I was looking into my saltwater tank today and see about 25-50 pin head size white spots, they are hard, and I can scrape them off. They are too small to get a good picture, they are mainly on the back glass and a few on live rock. Are they good or bad? they are an eye sore though. I hope this is normal, tank has been running about 2 and half months. My water params are great Ammonia 0 nitrite 0 nitrate 10. I have 60 lbs live rock..one little polyp frag, and 7 little fishies.