I recently had a sudden blossom of algae all in my tank bc I left town and my roommate opened the blinds for like 5 days. Since then my tank just has not been the same. I just did a 25-30% water change and have had to wipe off my brown algae (diatoms?) from my anubias nana and melon sword. My banana plant is not looking as green and healthy since I first got it...it requires low-medium light and that's what I have. Does it need fertilizer? Some of my corkscrew vals are turning yellow...what is the problem? Can anyone help? I just purchased API root tablets and inserted it into my gravel substrate. Was this a good buy? Any advice?