Have 3 xr15's atop 120 gallon

[toomuch420]

Turned them down to 40% scedule
Cause few different zoas have gotten smaller.
Tanks 24" deep and lights are 9" above water, zoas are on sand bed.
What do you all run these lights at for 24" depth? Is 40 to much ? I dont have a par meter


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[Tangerine Speedo]

Seems a bit low... My zoas like higher flow, high light and nutrients... On my IM 25 Lagoon I am running a XR30 and two grows. Most of the Zoas range from 8" to 2" under the surface.

 

[toomuch420]

Seems a bit low... My zoas like higher flow, high light and nutrients... On my IM 25 Lagoon I am running a XR30 and two grows. Most of the Zoas range from 8" to 2" under the surface.
View attachment 129928

Whats scedule percentage you run and what pinpoint %

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[mescobar]

I agree with Tangerine, seems too low of light. I have two XR15s (G5 blue) with RMS running at 75-85% with a 22" high tank. The RMS sits 7-8" above the tank.

Even at this level, my sandbed gets about 120 PAR. This should be adequate light for zoas, if they're upset something else might be pissing them off.

 

[toomuch420]

I agree with Tangerine, seems too low of light. I have two XR15s (G5 blue) with RMS running at 75-85% with a 22" high tank. The RMS sits 7-8" above the tank.

Even at this level, my sandbed gets about 120 PAR. This should be adequate light for zoas, if they're upset something else might be pissing them off.

Thx. I moved them to rack to see if snails or something irritating them

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