At a loss, corals bleaching.

marcel leroux

New member
All my parameters are good. Tested myself, also took water to a lfs to double check, they got the same results as myself. Could it be my lights? I changed from a coralife 4x65w fixture(my corals were doing great under these lights, changed because i thought Tek would be even better) to a Tek 6 bulb t5. I only run 4 bulbs now as i felt that it was way to bright, even now with 4 bulbs it seems to bright. Could it be the lights?
yes . you have to slowly acclimate them to the new lighting. cut your photo period down . when they recover, then each week add an hour of light. if they start to look bad then stop or take a step back