I have heavy brown, grey, sometimes green, but mostly brown algae problem in my tank, it's a 15 gallon whcihI had established for a year now. My tap water contains high level of nitrates, not sure about phosphate as I have not tested it, the tap water is soft. How can I deal with this problem? I also have a lot of light, I've been told light doesn't really matter when dealing with algae but only the nutrients in the water do. I have an anubias and cryptos, covered in algae, my valls and amazon swords died because of the algae, it's a really pain scrubbing them off. Will a pothos plant get rid of this problem?