Hi there! I just set up a 20 gallon tank (moving my 10g filter over, and some gravel from my old tank.) These are my readings: Nitrite-0 Hardness- 300 (Yikes! How can I fix this?) Chlorine-0 Alkalinity-180 PH-7.8 or 8.4 Nitrate-0 Is it okay to move my small common pleco into this new environment? I am very fond of him!