2 AI primes or 1 AI26hd

AI Nero 5
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DaJMasta

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Personally, I'd go with two Prime HDs because you can space them a little farther apart and get a bit more even coverage. That said, that tank is pretty deep, I don't know if the light output is going to be great at the bottom of the tank with only two - depends on what you want to keep. Worth mentioning: two Prime HDs is less total light output than a single t247, and a single Hydra 26 is less than that. The Hydra 64HD is more comparable to the output of a t247 fixture.
 
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mbarton2010

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Personally, I'd go with two Prime HDs because you can space them a little farther apart and get a bit more even coverage. That said, that tank is pretty deep, I don't know if the light output is going to be great at the bottom of the tank with only two - depends on what you want to keep. Worth mentioning: two Prime HDs is less total light output than a single t247, and a single Hydra 26 is less than that. The Hydra 64HD is more comparable to the output of a t247 fixture.
I have a bunch of SPS at the top and zoas, acans, hammer and torches near the bottom
 

HudsonReefer2.0

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I have a bunch of SPS at the top and zoas, acans, hammer and torches near the bottom
Sounds like a plan. Way I have my mixed reef. I had a hydra 26 when they first came out. Served me well. Now it just lights, 10% on my Fowlr.
 
Avast

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2 16 hds would be my choice.
I run 2 on my 20g 18" nano cube and its 95% sps. I run 3 on my 36x24x12 frag system.
Tank will be 4 months old tomorrow.
20220523_181359.jpg
 
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