So I recently purchased some Pom Pom Gracilaria from aquabarn, it was beautiful nice red. today I noticed its turning white like if it's bleached , my tank is freshly new, and currently just have cerith snails, and 2 clown fishes. In my refugium I'm using the 18w chaetomax light and have some chaeto and Clean Sea Lettuce also from aquabarn, those macro algae are doing fine, but the Gracilaria. Is it possible the light is too much for it and causing it to die off?