male false perc refuse to eat...help!

[colourmop]

i have a pair of false perc in a 12 gal, hosted by H.magnifica. they are 1.5 inch long, and the female is a aggresive eater. but the second day after i installed my MH, i noticed the male F.perc hide in the cave for a long time during light time, and not that aggresive on food. today, he spend all 7 hours in the cave and havent touch any food i put in the tank, and my cleaner shrimp show great intrest in him.
nothing special has appeared on the male clown, he just not that hyper and havent eat for 2 days.
anyone know what should i do? i tried the garlic extreme, female went berserk with food...but male still stay in the cave, or just look at the food but not eat it.

 

[hifi]

Id cut back on the light time & slowly have the lights on for longer. I think your clown's is a bit shocked from the new lights or, how many watts of MH are you running? How close is it to the water? I ask because it may be heating the water to much. Is your temp ok?