Is it okay to put table salt, which has calcium silicate? What is proportion? My fish has red spots on them. It happened when I moved them to a bigger tank. I don't know if it was from some driftwood I put in the tank. There are stuff sticking out of some of the red spots. It is red where the fin meets the back of the fish. Red spots are also all around the fish.it looks like blood, but the scales are visible.Thank you very much.