The TDS meter is brand new and is suppose to be calibrated. It is actually a in-line meter, with an in and out sensor. Input is showing 80-100 ppm, out 0. I could swap the sensors and see what happens but I am guessing it is working correctly.

Lighting is about 8 months old plus it was off for over a month during the house move. I kind of holding off doing big water changes since I thought the water might be fueling the problem. I am going to do a 18 gallon change this weekend.

Thanks for the input.