Is the Atlantik iCon good for SPS corals?

Yes. Its dual-chip 5W LEDs and full 10K–50K spectrum give the intensity and blue-heavy bands SPS tanks need. Most owners run it at partial power and ramp up slowly.

How big a tank does one panel cover?

The 720 mm panel covers a wide footprint, so it suits tanks roughly 4 feet and up. Deeper tanks may need higher mounting or a second unit for even spread.

Do I need the app to use it?

The free Orphek iCon app is the main way to set schedules and dim channels, and voice control works too. There are no physical dials for fine tuning.

Can I replace the LEDs myself?

Yes. Orphek uses plug-and-play parts, so LED boards and drivers can be swapped without soldering. The glass lenses over the UV and violet LEDs protect them during service.

Is it safe above an open tank?

The power supply is rated IP65 and the connectors are waterproof, which handles splash and humidity. The light itself should still be hung clear of direct salt spray.

You get the light unit and its power supply; hanging or mounting hardware is sold separately. Check that your canopy or bracket can carry a 7 kg panel.