One difference is the Apex has controls for variable speed powerheads and the Apex Lite doesn't. You would need to upgrade the Apex Lite if you want to control variable speed power heads.
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120 gallon sps/anemones/LPS reef since 2004
Apex controller
8 x 54 watt T5 PowerModule
Herbie's silent overflow system
Jebao DC 12000 return pump
Jecod CP-40 Cross-flow circulation device
Mini Bubble King 180
Barr Aquatics calcium reactor
Bucket fuge
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