Reading PAR with apogee

[HeyLookItsCaps]

Do y’all turn off your systems flow when doing par measurements? I rented a unit for the weekend and I want to make a map of the par in my tank…. Also any other pointers would be great

 

[Drendo]

Following

 

[Gtinnel]

I don't turn anything off. I try to take my measurement with the tank running like normal since that's the best way to see what par your corals are actually recieving.

 

[SPS2020]

Yes, I turn off all flow for an accurate (stable) measurement. If flow is on, the numbers are all over the place. Although I have a tremendous amount of surface movement with gyres. I do take into consideration both flow and no-flow values though.

 

[HeyLookItsCaps]

Yes, I turn off all flow for an accurate (stable) measurement. If flow is on, the numbers are all over the place. Although I have a tremendous amount of surface movement with gyres. I do take into consideration both flow and no-flow values though.

Same here, that was my main concern, I have opposing gyres at the top 1/3 for sps, and was wondering how much that would screw me up. Maybe do both like you’re saying is the best call

 

[Gtinnel]

Maybe Ive been doing it wrong. Although I am fairly new to having a par meter.

 

[Thor2j]

I've had different par meters and gyres for many years. Difference between flow on and off is minimal.

 

[DrMMI]

I'd leave the return pump on as the water volume will drop if you turn it off, which will affect the par reading.

 

[Hurricane Aquatics]

Some lights it won't matter if pumps are on or not. Kessils are aust to turn off as the PAR readings jump all over the place. I would take them with pumps off, makes it much easier.