What percentage should I run

[xabo]

Switched out 3 400W Halides (11" above the water) for 3 Xr30wG4 pros on a 220 gal SPS tank. The Radions are 9" above the water. What percentage should I run the Radions?

 

[Crabs McJones]

Switched out 3 400W Halides (11" above the water) for 3 Xr30wG4 pros on a 220 gal SPS tank. The Radions are 9" above the water. What percentage should I run the Radions?

Whenever you go from MH to LED, you want to start out low, the switch-over can be shocking to corals. Start out with a low percentage, say 30%, and ramp it up little by little from there. 10% a week is what I usually do. I know it may not seem like much, but trust me you're corals will appreciate it long term. If you have access to a par meter that would be best to check what kind of levels you have. Otherwise keep ramping it up, when you see that the corals are getting upset, crank it back by 5%, wait a week, if they're still upset crank it back another 5% and that should be your sweet spot. Good luck!

 

[xabo]

Hmmmmmmmm...........................the owner of a LFS stated to start at 75%

 

[MTBake]

I agree with crabs_mcjones, start low or you'll burn/bleach coral.

 

[saltyfilmfolks]

You can yes. But Led can be weird.
So can changing spectrum.

One member here added a simple blue led strip and caused a very unique type of diatom to bloom.

So you kinda need to account for that spectral change.
Although the overall par of the mh and led are the same , the led may be giving a lot more of a narrow band of the spectrum.

 

[saltyfilmfolks]

I agree with crabs_mcjones, start low or you'll burn/bleach coral.

A fwiw, the mh at that distance probably gave the top of the tank close to full daylight par. The radions are not as powerful.
But they could deliver double the 450nm depending on the settings.

 

[xabo]

Will take you guys advice as you all most likely have more experience with the different styles of lighting.

 

[Crabs McJones]

Will take you guys advice as you all most likely have more experience with the different styles of lighting.

@saltyfilmfolks is my go to guy, his word is law lol

 

[saltyfilmfolks]

@saltyfilmfolks is my go to guy, his word is law lol

He’s a hack.

Some folks make the transition with zero probs , some don’t.
I wound def try to figure out the par from the mh and the spectrum and try to get close later on.

 

[trido]

I think that 30% is too low of a start from 400W MH. Id start at 50% myself but also I'm a bit of a risk taker.
I dont have radions but run my LED at close to 100%. LED's do have punch though, I grow SPS all the way to the bottom of my 210.

 

[Crabs McJones]

I think that 30% is too low of a start from 400W MH. Id start at 50% myself but also I'm a bit of a risk taker.
I dont have radions but run my LED at close to 100%. LED's do have punch though, I grow SPS all the way to the bottom of my 210.

30 is probably low, I agree, but I use that as a safe haven, that way no matter what the corals won't freak out

 

[xabo]

Been running the Ecolab AB+ template for about a week @ 75%. No adverse effects so far but minimum PE so far. Didn't have much with the Halides either.