About a week ago I got some rock fresh from the ocean with some beautiful coralline algae on it but I'm concerned that I might experience bleaching due to my crappy light...(it's a FOWLR so lighting isn't as important as it would be for a reef tank). It's a 30 watt light and has two settings which let you choose between white light and blue lighting. I heard the blue is where the "par" comes from which is what the coralline needs to keep its color vibrant so should I have the blues on for at least part of the day or is should the white light be just as good since it contains all wavelengths? It's also close enough to a window to receive some natural light but how much is what I'm not sure about. If it does bleach will the color return after buying a new light? I know coralline doesn't need high light but what should I do if I notice the start of bleaching?