Hey im not an expert but 10.5 watts per gallon is really high IMO. I have 4.7 wpg and my corals are going great maybe you should get a guy to come in to test you lights when they are at full power

ghting

The lighting requirements for a FO or FOWLR tank are fairly flexible. Reef tank lighting requirements, on the other hand, are rather strict. Check the total wattage of your present tank lighting to see if it is powerful enough.

Light Intensity
The lighting rule of thumb for a healthy reef tank with SPS/LPS Corals, Anemones and/or Clams is 3.5 to 4.5 watts per gallon of tank water.
If you can not bring your lighting up to this level, you might want to stay with Soft Coral species, which normally require a bit less lighting (2.5 to 3.5 watts per gallon).
.
Photo Period
The "normal" lighting period for a reef tank is 12 hours on, 12 hours off.
Extending the time the tank lights are on (say, to 14 hours) will increase the total lumens reaching your corals with your existing lights.
Example: 257 watts for 14 hours is equivalent to 300 watts for 12 hours.
Bulb Age
How old are your bulbs?
Most bulbs should be replaced every 9-12 months as their spectrums tend to fall with use.
Lighting Upgrades
New or Additional Lights
Upgrade your present lighting with new and/or additional lights.
See Top HO & PC Fluorescent Light Fixtures for descriptions and sources.
Retrofit
Modify your present hood or canopy to accept higher light systems.
See Top PC & Metal Halide Retrofit Kits for kit descriptions and sources."

And you should really try to stabilize your heat think about it this way would you like your house to go from 75 to 55 every night

Delt

also if i might add - - X amount of watts per gallon is directly affected by the depth of your water ...I.E a MH light will make your corals grow like mad at ....say...24inches deep but that same fixture would cook them at 6 inches deep....so placement is critical, good luck, Boss

lol i don't think anyone was saying you were completly wrong delta {for gods i know i wasn't lol} just adding our 2 cents in as well...so he can make an educated choice from others do' and don'ts....... you got a pretty nice tank BTW...Boss

AAHHHHHH!!!!!!! - - -seems that cameras and aquariums don't get along real well.....the one thing that worked for me was.......dark room except for tank lights, and i put my finger in front of the flash about 1/4 inch out {so it still flashes but doesn't reflect in the glass...............other than that, remember that we are limited to 500K for picture size...which mean s i have to set my 8.0 megapixel camera down to 2.1 megapixels just to get it to fit.........im hopeing they expand the size restriction so we can post nicer pics one of these days.........Boss

after another trip to my lfs and another test my kh is pretty high 22 drops could this be a problem. this is after a 50% water change during the last 2 weeks
after having the same talk i have had here. his advice was- as good of a filter the fluval-405 is its not giving me the adequate filtration i need.
a sump is the way he would like me to go and i believe him but it is out of the question the ole lady is not hearing the risk of a overflow and no matter what i say thats the law.
so my question now is about adding the eheim wet/dry filtration model 2229 $329.99 at (drs.fostersmith.com) along with my fluval 405 should this be adequate and if not what other options r out there