IMO if you're happy with the current lighting setup, why change it? If you are indeed happy with the growth and colour then I wouldn't change anything. If your fear of upgrading and bleaching corals or burning them etc.. is one of your concerns and yet your happy with the current setup.. it's not worth the effort and risk of the upgrade. If your wanting more colour from you corals maybe a change in bulb (k rating) or adding more or adding in general supplementation.
My 2 cents !
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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