Hello all, My Vallis' seem to be having a problem. Over the last 2 days some of them have started browning from the ends of the leaves. The ones that have are between 50-90% browned. Not all of them have it and the ones in the most light seem to be ok. I know they have high light requirements and Im only offering the whole tank about 38W at the moment. Is this an indicator of not enough light? Or something else? They get dosed with Flourish 2x per week and Flourish Excel every day. I also dose Flourish Iron every 2 days. Any thoughts? Thanks.