Colours Fading

[Lampshade]

Could be lights, but that would take a long time. Generally it's water parameters, check nitrates/phosphates see if there's any issues, or if you're getting excess algae. Could also be biological since you have softies and LPS, are you running carbon? There's many different things it could be.

[Newbie Fish]

I just put carbon in, but that was after the colours deteriorated.

[msjboy]

With your small tank, and corals like leathers/toadstools, there may now be chemicals emitted by the new corals.

Msjboy