10% as compared to what ? Growth is contributed to flow and light and food. Nitrates and phosphates will affect colours. I would remove ur ceramic pieces and ensure u don't have a large build up of detris around the rock in the sump.
__________________
360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank
|