Got a 75 gal. with 2 40w flor. bulbs. I've noticed that the water has a "haze" to it. The chem. is pH= 6.6 Amm.=0 Nitrites=0 Nitrates= 20 and temp. 80. I did a water change on x-mas eve and its still hazy. Was actually hazy before that aswell. Why? Why is the water hazy and what can I do?Its a well kept tank with no overfeeding. My 10 gal. has the same chem. except pH and its 7.2 but thats it. Its clear as a bell. Where do I start?