nutrient ratio

I am having an algae issue. My Nitrates are .1 and my Phosphates are .4. What is the best way to get them in balance? Should I dose for nitrates?

This quote summarises my current understanding of nutrient reduction with biopellets: If biopellets reduce N and P in a 16:1 ratio, then it follows that by providing excessive nitrogen (not NO3), phosphate should be reduced further, while nitrate should still be at an undetectable level. Can I...