Why do they look like this?

[reybeast]

Please take a look at these pictures, same coral, the colored one is when we first got it, the second picture (washed out) is from yesterday. This is a 90G (48x18x24T)and they have always been about 8 inches from the sand. I have (4) 110w VHOs on it since we started the tank, which is about 7 months old. My params are very good and all my other corals look great!

[Mr Cob]

I would say they need stronger light.

Do your bulbs need to be replaced? I kept them under VHO's before but I also dosed Phytoplankton. Try spot feeding them one a week. They will eat small pieces of food.

[reybeast]

Lights are no older than 3 months. I use DT's phyto every other day but not spot fed, just thrown in the tank with pumps off but I keep the Tunze and (2) Koralias on to move water in the tank. I thought the bleaching was an indication of too much light?

[Pennies2Cents]

Try Idodide for Reef tanks? I had the same problem.. They colored up soon after..

[stoneroller]

The first thing I'd do is get those mushrooms away from them. I'm not saying that's the cause but it can't be good.

[caferacermike]

I've never felt trumpets to need a lot of light, I'd think your set up would be ideal. Any chance they are being beaten by current, fish or anything else? Do you dose anything? If not I'd look into adding B Ionic to your lineup. You say your parameters are good. Could you describe them better? Do you only test for the big 3? Are you checking your Ca, Mg, ALK/DKH? If any of those levels are low it could adversely affect the coral.

Rereading your post it sounds like you have a lot of flow in the tank, that is generally good. Make sure that the coral is in a very secluded location with low flow. Bleaching is generally an indication of poor light conditions (if it's the light causing the problem) as the algae within the cells dies/regresses, leaving no pigmentation within the coral. I don't think DT's is a good food for such a coral. I'd be trying to spot feed it with cyclops or rotifers. When I kept those corals and fed them a mix of those 2 plus live brine, they would reach tentacles way out to collect the food. I don't think phyto would be meaty enough for it. Adding Iodine to the water as recommended by the manufacturer will help to promote good color.