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What the best combination to use for a 4 bulb 48" 54w fixture . Just tring to get idea of what works best for coral growth I have lps but looking to get a maxima clam
4 bulb over a 75g might be stretching for a clam, you might have to put it up higher. I would probably go 2x blue plus and 2x coral plus but that is just me.
For a maxima you will want it up higher I agree. I always liked Giessman Actinic, 2 blue plus, and a UVL Aquasun. With 8 bulbs I had slighly different.