I try to change once a year for T5. Black Friday.
Change the bulbs and clean the reflectors.
and i change the radium bulb once a year on 4th of July weekend.
Thank you for the comment. Things are finally going well fo rmy tank.
Due to high salinity, i lost some big pieces but i was able to recoop frags from fellow reefers in the area.
Hopefully, my Redplant can get huge again.