Unhappy clam

The original lights were Odyssea PC's, 65W Actinic/65W 50/50.Now running Odyssea 250W MH/ 2x 65W Actinic PC. I don't see any physical signs of damage or parasite, but the clam is barely hanging on. It rallied yesterday but is more receded today.

Should I FW/hypo dip it or just leave it alone?

-- edit ---

One other thing- there was a small 100gph powerhead that I had blowing on the anemone. I noticed a reduced rate of flow today, and since I can't get to it anymore (rocks fell on it) and I haven't found a ground probe I pulled the plug. I'm wondering if it's a voltage thing (co-worker "borrowed" my multimeter).

There are still two new Koralia 2's (one two days old, the other two months old) and the heater in the tank, no other electrical at this point.

 

-- edit after a trip to Radio Shack ---

No stray volts or amps. I checked with each device plugged and unplugged.

 

Definitely the lighting....

 

Tag it and bag it. RIP crocea.

 

Sorry to hear it.

 

You lights are/where weak for that species of clam If you where using better bulbs ? and had the clam right up under them then you may have been alright. But as for internal parasites of clams you can't see them.. The next Clam you get just take some R/O water get it to close temperature and carbonates and set the new clam in the F/W for about 10 Min's, and watch what comes out. I have taken clams next to go and dipped them and got them looking like new again ..It can take a clam a yr to die . And the clams do not rely on water currents that much they make their on some is good but not so much to blast and wave them 24/7 and once you decide where you will set it in the new tank! Set them and let them be moving them about is a leading cause of death. and always set them in or on a old clam shell or rock .