I was curious about the PAR values in my RSM C-250 with the Kessil AP700. I used the Apogee SQ-520. I roughly gridded out the tank using painters tape and a ruler.
Measurements:
Depth below water at 1, 6, 12 and 18 (sandbed) inches.
Width from back at 3, 6, 9, 12 and 15 inches.
Length from...