So my anubias nana just started to develop brown spots. Not diatoms or algae but actually on the leaf. The rhizome is between two pieces of driftwood, but has flowing water around it. Could it be just because the rhizome is not getting direct light? I've read that anubias can grow without receiving direct light to the rhizome, but grew slower. I also have my lights on for about 10-11 hours a day. Could it be too much light? Burn? I'm going to reduce lights to 8 hours starting tomorrow. I do add ferts so I don't think its a deficiency, as it did just fine before I moved it around in the tank without ferts.