does anyone know how long it takes the product Prime to remove the nitrate and nitrite in the water...I am moving my channa bleheri into another tank and putting a 2.5 inch fahaka puffer in the 55gal. Did a 75 percent water change thursday and another 40 percent today, however after testing my water the nirate was still high, so i bought Prime and i'm wondering when it will be safe to introduce a delicate fish like a fahaka in this tank...i also added a brand new aqua clear 20 so including that new filter i have about 80 galons of filtration for the 55 gal tank.