Phil,
Not that I have found, I have been taking samples and the Ammonia, nitrite, and nitrate levels are great. 0,0,2 PPM lately, and the PH remains at 7.4-7.6. The temps are 80-82F. As we have added more fish, I expect to see different levels, but that will be because the extra food. The media is rated for 3-6 pounds of food a day and we will be nowhere near those levels, so I expect good numbers going forward.
