I'll second that... used 2x65w PC on my 20g and the BTA's and RBTA thrives.
Let me just SUGGEST... you will thank me later if you go this route. Metal halides.... it's the best way to go. A 150w HQI over a 20g is amazing... just a thought.
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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