This similar but more-light SURF2xx is shown here floating for its first day in the sump of a large cylindrical saltwater fish only tank maintained by Jim Stime / LA Fishguys.

The super bright white surfaces keep the algal roots alive when growth gets thick. And the LED light lid is shown in low power mode, with only 4 of the 8 LEDs on (too much light will reflect off of the white surfaces, and slow down new growth).

Also you can hear how the LED lid completely silences the bubbles. The sound of bubbles is always loudest when new, because there is no growth inside to muffle it, but once growth starts it will be quiet even with the lid off.

The first coatings of growth will be visible in about a week:

https://youtu.be/Z6C9kgYAY3w