In my tank ive noticed ive been developing a brown algae on the surface of the glass and its also covering a decent portion of some of the leaves on my plants. It is a relatively new tank but I believe its just about finished its cycle (learned the hard way). I am due to replace the carbon filters in my filter. Could this be down to this or a lighting issue? I have 2x strip lights that say 10k on them. I do have some alternanthera cardinalis variegata plants in there that just seem to be getting eaten/falling apart and not growing