I have an algae problem that started when I began adding fertilizer so I tested my phosphate and it’s super high in all my tanks. It’s also super high in my tap water which is what I use for my tanks. What should I do? Do I have to spend money getting phosphate removed to always have in my tanks? Is it dangerous to have his phosphate levels. All my fish are fine, I just have an algae problem in one of my 13 tanks.