Light advice & circulation

[brianxcheng]

Hi all,

Currently my display SPS tank size 116L 66W 53H cm and coving by XR15 x3 and setup as strike straight and side by side. Above water surface around 20cm
I wondering should do I have enough par, as I don’t have the par meter. I do have some concern at the front and back area coverage.

Another question for advice is about the return pump,
My display tank 360L sump 140L total 500L and currently using the 4000L return pump (Octo various 4). According from my hydros flow sensor it’s only in average 750 LPH in my sump pipes. Do I have enough flow for circulation. Thank

 

[Zoa.Mania]

The thumb rule for return pumps is about 5-10 times of the system volume per hour.
You can be just fine with less than 5 times if you feel it makes too much flow but I think 2 times is not enough