Green Lettuce Sea Slug

Elysia spp

Saltwater Invertebrate Species Group: Sea Slugs Family: Elysiidae

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Water parameters

Temp 76-80 F Temperature

Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.

pH 7.8 - 8.4 potential of Hydrogen

Measuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.

NO3 1-20 ppm Nitrate

While less toxic than ammonia, high nitrate levels (above 40–80 ppm) are important to monitor because they can cause fish stress, stunted growth, and harmful algae blooms.

NO2 <0.0001 ppm Nitrite

It is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia

PO4 0.01 - 0.1 ppm Phosphate

It is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.

NH3 <0.1 ppm Ammonia

It is the primary killer of aquarium fish, causing gill damage, stress, and death

Ca 380 - 450 ppm Calcium

Supporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae

KH 8 - 12 dKH Alkalinity

It acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.

Mg 1200 - 1400 ppm Magnesium

It enables coral growth by supporting skeletal formation, assists in metabolic processes, and ensures that calcium is available for corals, clams, and coralline algae.

SG 1.023 - 1.026 SG Salinity

Essential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals

ORP 250 - 400 mV Oxidation-Reduction Potential

A higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.

About Green Lettuce Sea Slug

General information

The Lettuce Sea Slug is an unusual and entertaining addition to the reef aquarium. It has highly folded parapodia (side appendages), which give it a ruffled appearance similar to lettuce. The Lettuce Sea Slug is captivating not only for its interesting shape but also for its purposeful and comical manner in which it creeps along your reef aquarium. The coloration of the Lettuce Sea Slug generally ranges from green, yellow, or brown. The Lettuce Sea Slug is not a true nudibranch. The Lettuce Sea Slug will do well in established aquarium systems, if provided ample room to forage. It prefers an aquarium with live rock so that it can graze on algae. The Lettuce Sea Slug incorporates the chloroplasts (the portions of the cell responsible for photosynthesis) from the algae into its tissues, and thus relies on photosynthesis for part of its energy. Pump intakes and drains can harm the Lettuce Sea Slug, so care should be taken to screen these off. It is sensitive to high levels of nitrate and will not tolerate copper-based medications. The Lettuce Sea Slug has no distinguishing characteristics to help differentiate it from its mate.

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