Lightning:
I did test the PAR. Initially, it was at 200 at the surface and 110 bottom center. Around the center it was 75 range. left side of the tank where lights are not there is giving 40 Par below.
I bumped up sunny setting Ch1 to 90, Ch2 65.
Now I am getting 325 Par surface, Ground 250 PAR, all round the tank 150.
In addition, If I turn on T5 in the noon, it will add additional 50 PAR everywhere for next 4 hours.
With Marine Care test kit, 10ml water, 15 drops alkalinity titration. My alk is at 15 :(