Sand anenome

My sand anenome has been fine for nearly 2 weeks in my tank, today i come home and find him not in the rock as he has always been, wonder if its my lighting, i know t5 are good for 20" deep but my light ontop of the luminaire the light has to travel 25" to the sandbed could this be the cause , see pic?

lights are 4xwhites 39watt
2xactinics 20watt

 

Your lighting is fine. It's the distance travelled through water that is of concern with lighting. Your 55 is only 20" deep, minus about an inch on top and inch on bottom. That's 18" the light has to penetrate. No problem. T5s do just as well as MH at that depth. And you are running better than 5 watts per gallon which is more than enough. It will move from time to time to find better flow, more food in the water column, or a myriad of other reasons only known to the anemone. Mine moves once weekly pretty routinely. I am always on the watch, protecting my corals from it's tenticles. I wasn't paying very good attention a few months ago and it moved right next to my finger leather. The stinging it endured took a month to get over completely. So just be wary.......

 

just out of curiousity.. what substrate are u using?

 

I did notice something here. I was looking at your signature and saw 8x39W. In your note (which I completely glossed over), the lighting is 4x39W white and 2x20W Actinic. I was presuming that you had 4x39W actinic in your setup. If you only have six lights that are in working order, I would had 3x39W actinic. That may be an issue down the road. Now you can feed the anemone a small bit of silverside every week or so to suppliment the lack of actinic lighting and do just fine....but your tank health will improve dramatically if you step up that portion of the spectrum.

 

I have 2x20watt 22k actinics blue, are you saying add another of these?

Also there is 4x39 watt 14000k whites