changed to leds im now having trouble

[kay181]

i have a 40g breeder that i desided to try leds went with a cheaper 120watt tao set up well everything is fine but my coralline has all turned white
i had 250watt metal halide 20k xm with hamilton cabo sun refletors , lumatec ballest. do you think that the leds put out more light to bleach coraline
my sps are doing great lps stated to bleach so i rased it up 3" now are coloring back up they are 7 inches off the water 2 inches higher than halides
should i go higher with led

 

[cdness]

That happened with my 120W Evolution fixture. Too close to the water so I raised it up. Those LEDs put out a TON of light at full blast. My next system will be dimmable and raised way up in the canopy so I can adjust via dimming before moving them lower.

 

[kay181]

so how high do you keep yours off the water

 

[Reef Breeders Verified Sponsor]

If they are not dimmable, then that is what did it. Try putting 4-5 layers of screen over the tank, then remove one layer every 4-6 days, and your corals should acclimate.

 

[jstlsn]

You can also shorten the amount of time you have them on during the day. Then slowing increase the amount of time back up to where you had it originally.

 

[pumarjr]

+1 on just shortening the photo-period, your coraline should return, it got shocked with the increased par.