. Nutrient Management (Nitrate & Phosphate Reduction)

Phytoplankton naturally consumes nitrates and phosphates, which are common byproducts of fish waste and uneaten food. If left unchecked, these nutrients can lead to algae blooms and degraded water quality.

• Biological uptake: Phytoplankton absorbs nitrates and phosphates during photosynthesis.

• Competes with nuisance algae: By consuming available nutrients, it starves unwanted algae.

• Supports export systems: When phytoplankton is consumed by filter feeders or skimmed off, it takes excess nutrients with it.

🦐 2. Boosts Pod Production (Copepods & Amphipods)

Pods are a cornerstone of a thriving reef tank, serving as:

• Natural clean-up crew

• Live food source for fish like mandarins and wrasses

Phytoplankton is their primary food source in the early life stages.

• Improves pod survival and reproduction

• Creates a natural food chain from phyto → pods → fish

• Sustains biodiversity in your refugium and display tank

🧪 Bonus Benefits:

• Enhances coral color and growth: Especially in filter-feeding corals like gorgonians and non-photosynthetic (NPS) species.

• Feeds filter feeders: Clams, sponges, feather dusters, and some LPS corals benefit from regular phytoplankton dosing.

• Improves water clarity: By supporting biological filtration and reducing detritus buildup.

✅ Tips for Using Phytoplankton:

• Use live or properly preserved phyto (e.g., Tetraselmis, Isochrysis, Nannochloropsis).

• Dose regularly but carefully—avoid overfeeding, which could fuel nutrient spikes.

• Turn off skimmers for 30–60 minutes after dosing to prevent immediate removal.

In Summary:

Phytoplankton acts like a foundation species, fueling the micro-ecosystem that keeps your reef tank balanced and thriving. It supports nutrient reduction and boosts biodiversity by feeding pods and filter feeders.

Want help choosing the best species or figuring out a dosing schedule based on your tank size and inhabitants? Just let me know!