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Dinoflagellates in Reef Tanks: A Practical Action Plan

Dinoflagellates in a reef tank

Dinos usually thrive when the system is unbalanced. The goal is to rebuild competition and stability, not just nuke symptoms.

Common signs

  • Brown snotty film
  • Bubbles in mats
  • Rapid daily regrowth

Common causes

  • Ultra low nutrients
  • Low biodiversity
  • Instability after changes or treatments

A safe plan that actually works

  1. Confirm it is dinos (microscope if possible).
  2. Stabilise nutrients (avoid bottoming out nitrate and phosphate).
  3. Increase biodiversity and competition in the system.
  4. Stick to a consistent plan for 2 to 4 weeks and track results.

Recommended product: Dino Defence Pack

  • A targeted combo designed to restore competition and balance
  • Includes live bacteria, diatoms, and copepods in one pack
  • Built to support a biology first approach

Shop Dino Defence Pack