Awesome tank.
Have the flow from this single scp 150 worked for you long time? If I have only have had this in my aquarium for a long time and the result looks like yours - I had only replaced it with a similar pump.
However - I do not see a lot of fish in your aquarium - have you problem with fish surviving? If it is that way - then I would reconsider to use more than one pump and ensure that there is a sufficient exchange of water between the bottom and the surface.
This is due to the fact that such a large biomass of photosynthetic corals, as you have, produces a lot of oxygen during daylight but also consumes a lot of oxygen during darkness. The risk of areas with low or no oxygen content is high unless there is a good mix of the water between the bottom and the surface. The oxygen is both supplied (at night) and removed (during the day under lighting) via a strong surface water movement, but must be properly mixed with the bottom water. I have a similar typ of tank - half the size - and not so densely "planted" as yours.
I use a total wave maker capacity of around 40 000 L/H. I have 5 Wavemakers - Two in the bottom part (one at each side and both hided in the rock work), 1 on the left side in middle water blowing down an 2 on the right side mainly blowing in the surface. I mostly have them on short wave maker mode, creating more or less a standing wave (a Seiche wave) especially during light peak time and night. This type of waves move a lot of water.
I have - as usally for reef aquarium - a surface overflow for my recirculating pump but my aquarium interior is designed so that most of the water must pass from the bottom up via a narrow crack up to the overflow comb.
However - if you do not have any problems with your fish and CUC - do not change to much because the aquarium is great - IMO
This video show my first 5 years with my aquarium - its 8 years old today
Sincerely Lasse
