There are a few products available that remove nitrates and phosphates, but in doing double duty, a product’s potency is reduced. There are different mechanisms for removing phosphate and nitrate from your system and often, one will work better for one product than the other. If you are having continual issues with both your nitrate and phosphate, take a close look at your maintenance regimen and fishes’ diet before dumping something else into your system for a quick fix.