Thoughts on SPS polyp extension..

marie · #1 08-04-2011, 05:48 AM

I could be wrong but one of the reason for lack of extension in corals in the wild is predation. My acropora don't extend their polyps much during the day because I have 4 angels that constantly nip at them and I suspect my copperband butterfly also has a taste now and then

Aquattro · #2 08-04-2011, 05:52 AM

Marie, I thought about that, but really can't see any fish nipping, and I've watched for hours straight. And I had strong PE with these fish, it just stopped after switching salts.

lastlight · #3 08-04-2011, 05:56 AM

Maybe the substrate in your water column is sand-blasting them =)

Aquattro · #4 08-04-2011, 06:04 AM

Quote:

Originally Posted by lastlight

Maybe the substrate in your water column is sand-blasting them =)

Ya, that's my original thought, irritation from the turbidity. I swear I'm losing 30% of my light to the dust cloud!

Darren, pretty sure it's not fish, I have mostly large tangs and a couple of large wrasses, 4 clowns. No known coral nippers.