The nitrifying bacteria might help with nitrates. You will get more help if you start a new thread and list any issues you might be having !I am in a similar position with phos at .90 via a Hanna tester. Tank is 4 months old. My nitrates are high around 40ppm. Ammonia 0, Nitrites 0 and ph 8.0 I don't have test kits for the other minerals yet. I also have a skimmer that has been running for a week now. I started cutting back on the frozen foods yesterday and will do a water change either today or tomorrow. My question is will adding nitrifying bacteria help with Phos or the nitrate? I understand that right now my bacteria is able to handle the load from the tank since ammonia and nitrite is 0.