March 2026
What is a Calcium Reactor, and When Do You Need One?
A calcium reactor supplies steady calcium and alkalinity for reef tanks. It becomes useful when coral demand outgrows…
What is Photoperiod?
Photoperiod is the daily light schedule in your aquarium. Learn how it affects corals, algae, and fish, plus…
What is a Biotope Reef Tank, and How Does it Differ From a Mixed Reef?
A biotope reef tank recreates one natural habitat, while a mixed reef blends species from many regions for…
Stable Reef Tank Water Parameters
Learn the ideal reef tank water parameters and how to keep salinity, alkalinity, nutrients, and pH stable for…
Reef Tank Lighting for Beginners
Reef tank lighting for beginners is easier when you focus on coral needs, PAR, and stable schedules. Learn…
Coral STN (Slow Tissue Necrosis)
Coral STN is slow tissue recession caused by stress, instability, pests, or poor placement. Learn how to diagnose,…
What is Coral STN (Slow Tissue Necrosis), and How Can it Be Stopped?
Learn what coral STN is, why it happens, and how to stop it with stable alkalinity, balanced nutrients,…
What is Coral RTN (Rapid Tissue Necrosis), and How Can it Be Stopped?
Coral RTN is rapid tissue loss in SPS corals, often triggered by instability like alkalinity swings. Learn how…
