Oct 17, 2017 #1 Fr4nkthet4nk Active Member View Badges Joined Mar 27, 2017 Messages 210 Reaction score 119 Rating - 0% 0 0 0 I will be measuring my light PAR in my tank. Should I turn my pump and wavemakers off?
Oct 17, 2017 #2 saltyfilmfolks Lights! Camera! Reef! View Badges Excellence Award Photo of the Month Reef Squad Emeritus Joined Feb 25, 2014 Messages 28,739 Reaction score 40,950 Location California Rating - 0% 0 0 0 I would do both. Fun comparison. Start with them off. Carful doing it with them on.