Purple Monsters Zoas

Zoanthus sp

Saltwater Coral Species Group: Zoanthid Family: Zoanthids

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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 Purple Monsters Zoas

General information

<div class="more_detail">Zoanthids feature a hard exoskeleton and are considered one of the most durable inhabitants in a reef aquarium making them the perfect piece for newbie aquarist. Their appearance resembles like a cluster of miniature sea anemones that often creates a hard matting appearance. While they look similar with sea anemones, Zoanthids are generally smaller with an oral disc measuring only from 1 to 2 centimeters in diameter.</div>
<div class="more_detail"> </div>
<div class="more_detail">For the Purple Monsters Zoas, they have a purple center all around the mouth and green tips around the disk. This is the water parameters in cultivating Zoas:</div>
<div class="more_detail">
<ul>
<li>Calcium: 380 – 430 ppm</li>
<li>Alkalinity: 3.2 – 4.5 MEQ/L</li>
<li>Phosphates: 0</li>
<li>Magnesium: 1250 – 1300 ppm</li>
<li>Strontium: 8 – 10</li>
<li><span class="subListHeading1">Temperature: </span>72° – 82° F (22° – 27° C)</li>
<li><span class="subListHeading1">Salinity / Specific Gravity:</span> 1.023 – 1.025</li>
</ul>
</div>

Diet & nutrition

In the wild, Purple Monsters Zoas has developed a symbiotic feeding relationship with marine algae called zooxanthellae. But in captivity, you have to feed them with nanoplankton or dissolved organics.

Determining sex

A mature tank is highly recommended in propagating Purple Monsters Zoas. They should be set in the middle or top part of the tank where they will receive the most amount of light.

Breeding & spawning

Purple Monsters Zoas requires strong lighting and moderate water flow.

Diseases

While the Purple Monsters Zoas are easy to maintain, you have to be alert for filamentous algae that can overgrow and smother their polyps. They are also prone to box snail which feeds on them, so you need to remove this particular snail from the tank. You also have to look out for large crustaceans and fish like angelfish and butterflyfish that nibbles on their tentacles.

Origination

Purple Monsters Zoas are abundant and can be found in the waters of the Indo-Pacific Ocean.

Cautions

Purple Monsters Zoas are known to possess high levels of palytoxin and vibrio bacteria, especially in their mucus. So, you need to wear gloves in handling them.

Acclimation process

Purple Monsters Zoas are purely marine. So, therefore, salinity must be maintained thoroughly at 1.023 to 1.025 specific gravity.

All photos

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