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Saltwater and Reef

Reef Tank Lighting: PAR, Spectrum, and Photoperiod

Reef lighting is measured in PAR, not watts or lumens. Here is what corals actually need, how to place them by light demand, and how to set a photoperiod that works.

8 min read

Saltwater and Reef

Marine Fish Diseases: Ich, Velvet, and Brooklynella

Marine ich, velvet and Brooklynella kill quickly and cannot be treated in a reef tank. Learn to tell them apart, respond correctly, and prevent them with quarantine.

10 min read