The algea scrubbers, Santa Monica sells are high quality units.
I use DIY scrubber myself but I have tested some of the Gem lights. The 660nm red led, is the algea scrubber standard.
Without a sump, your going to have green water, perhaps. When you change your scrubber.
My 100 micron 4 stage mechanical filter, gets washed, 2 times a week. I do a 55 gallon WC on a 130 gallon system.
My bio filter is a wet dry bio balls, oceanic model 75. The algea scrubber is 8"×14" single sided waterfall. Powered with twenty, 660nm 3watt leds, about 60 watts.
Inside the tank, I use two 60 watt led saltwater reef lights, and one 160 watt saltwater reef light.
So I am pushing at least 120 watts of 425 nm thru 660nm growing specturm..
My African ciclids eat algae, so this is my motivation, as they are very agressive, and don't fight very much if theirs something to eat.
The entire tank is covered in algea. The red leds on the scrubber grows more of the unwanted algea types. The tank grows more advanced algea. My nitrates are always around 17ppm, with 10ppm nitrates in the tap water.
I dose iron, phosphate, sulphate, to help the plants burn nitrate. When I feel the need.. This is the lower 75g. It is a fresh water Reef.
My top tank, is a 75g stacked on top of it.
It was purpose built, with chamber for a up flow scrubber. It has no algea growing in the display. It is lightly stocked, but nitrates creep up over several months to 40ppm. It uses an overhead filter floss tray, that gets cleaned about once a month. It was on a 5 led, 15watt, it grows a very lush screen, that is very thick.
I have no deep substrate, I have an permanent air lift, in step with a full length return flowing at 6 times, my tanks volume.
The way I think about it is you can never have too much led power, or scrubber screens. Even better is the heat trade off, if you use a 300 watt heater, a 300 watt led light will do double duty.