help needed for a maze Brain

[jauringer]

here is my set up: 46 gallon bow front, wetdry, bak pak skimmer, one PH plus the return = 600gph. 40lbs LS and 55lbs LR
2x96 watt pc 1 10k and 1 actinic
water : sg 1.023 ph: 8.2 alk 11 cal. 420 am 0 ;trite 0 ;trate <10;
temp 80
I have had a maze brain for about 3 months with no problems and tonight when i came home from work the back side of it is bleaching. what could be the problem. Is my lighting apropriate for the coral?

 

[harrysreef]

what level in the tank is it at? heavy, medium or low flow across it? anybody bothering it coral or fish?

 

[plum70rt]

does it look like this? more light the better, mine likes med flow

 

[jauringer]

yes it does look like that. it sits just above the sand bed in low flow. mine is not flat like yours though. it is in a dome shape so the top half gets a lot more light than the bottom (were it has started to bleach.