Phosphate

Phosphates (PO₄³⁻)

What to do when the level is too high?

Risks: detachment of coral tissues, algae and cyanobacteria blooms, interruption of growth, and alteration of coral coloration.

Measures: gradually reduce phosphate levels through regular partial water changes, use of anti-phosphate resins (Phos 0.04, PowerPhos), checking and cleaning filter media, adjusting the amount of food (optimal value: 0.02–0.08 mg/L PO₄³⁻).

What to do when the level is too low?

Risks: slowed coral growth, bleaching or discoloration of growth tips, uneven polyp development.

Measures: moderately increase nutrient input (controlled addition of Fauna Marin Phosphate+ or equivalent), adjust the nutrient ratio (NO₃/PO₄³⁻) to maintain a ratio close to 100:1, regularly monitor the parameter to reach 0.02–0.08 mg/L PO₄³⁻.