My tank is a year old and I can't leave well enough alone. My nitrates are 0. Ammonia 0. Nitrites 0. Phoshates 0. Calcium 480. Alk/kh 9.00/3.20. PH is 7.9, but has always been. I have tried everything to raise it but thats where it stays. So do I need a fuge? I want one. Seems reasonable.