How to Understand PAR Levels for Reef Aquarium Lighting

If you want healthy corals, understanding PAR is not optional. Many reef tank problems—bleached corals, slow growth, or dull color—come down to incorrect lighting intensity. Reef aquariums depend on proper light energy because corals host microscopic algae called zooxanthellae that perform photosynthesis. Without adequate light energy, corals struggle to survive. PAR stands for Photosynthetically Active […]