Hi. I did my first water change of aquarium, treated the water with filters off and did a water test. The nitrate was 0 safe, nitrite 0 safe, hardness 150 hard, alkalinity 120 ideal, and ph either 7.8 or 8.4 alkaline. I usually use Wardley's Bullseye pH 7.0 treatment, but do not have any of hand at the moment. Is there anything else you can do to correct the pH? Thank you.