I have had my new light (see sig) for about 4 weeks. I went up from a 42w 10000k.( 0.93 to 2.33wpg) I have had an increase in what I think is GSA. I had it before but ever so slightly. now the areas are about size of small eggs. It is quick to return after scraping off. Is this from my tank adjusting to the new light? I did start Sechem dosing a week ago. But nothing changed with the GSA. My diatoms are looking better but that could be from running the magnum hot shot yesterday, with DE.