Planning Light Zones
Map PAR across the upper third of the rockwork before placing demanding SPS. Fixtures with tight cones need taller mounting or staggered frags.
Acclimate new SPS frags starting in moderate light, then move upward over several weeks if polyp extension and color remain stable.
Spread and Mounting Height
Mounting height affects both PAR and room glare. Higher fixtures soften peak intensity and can reduce spill onto adjacent walls.
Maintenance access matters—if you cannot reach a frag without shifting rock, you will delay trimming and inspection.
Flow Patterns
Random, gyre-style flow helps prevent dead zones behind colonies. Laminar blast across SPS tips can cause tissue damage on some species.
Return pump turnover is only part of the story; internal flow shape around colonies matters more.
Alkalinity Stability
SPS show stress from alkalinity swings faster than many LPS corals. Keep daily swings tight on automated systems.
Dosing pumps should be organized and labeled—see our dosing tube management guide.
Lighting Accessories
Anti-glare shades and spill shields can make viewing tanks at night more comfortable without changing coral PAR under the fixture.
Nano tank clips and rails help position small fixtures without relying on unstable stacks of random brackets.
Observation
Polyp extension, tip color, and encrusting rate tell you more than a single PAR reading snapshot.
Photograph the same colony weekly under consistent lighting to spot slow bleaching or recession early.
Common mistakes
- Placing new SPS at the top of the tank on day one
- Measuring PAR once and never re-checking after rockscape changes
- Using one powerhead pointed at all SPS regardless of colony shape
- Ignoring alkalinity stability while tuning light schedules
This guide is for general reefkeeping education. Always follow the label and safety instructions on any product you use.