Need help with optics

[.AcroKiller.]

Im in need of optics im only getting 70 on the sand bed and about 200 on my rocks my tank is 31 inches tall 24 wide and 48 long and i have 72 leds. What optics should i buy. 60 degree or 90 degree


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[gmoney243]

60

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[.AcroKiller.]

Thanks mike


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