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• Living Oceans Aquariums (80L, 130L and 200L, available with black or white cabinets)
• Coral Livestock
• Clean Up Crew

How to Prevent Nutrient Spikes in Your Living Oceans Aquarium

One of the biggest causes of algae outbreaks in a marine aquarium isn't overfeeding or poor maintenance. It's livestock that has died and begun to decompose.

A dead snail or deteriorating coral can release a large amount of nutrients into the water before you even realise there's a problem. Fortunately, a quick daily inspection is usually all it takes to catch issues early.

Why Dead Livestock Causes Problems

Every aquarium naturally contains nutrients, but when an animal dies, those nutrients are released much faster than the ecosystem can process them.

This sudden increase, often called a nutrient spike, can lead to:

• brown diatom algae
• cyanobacteria
• increased algae growth on the sand, rocks and glass

The aquarium itself isn't necessarily in danger, but it does need the source of the excess nutrients removed so the ecosystem can return to balance.

Check Your Snails Every Day

Snails are one of the most important members of your Clean Up Crew, but they should also be one of the first things you check during your daily inspection.

Healthy snails are often found grazing on the glass or rockwork, particularly at night, as many species are nocturnal.

A snail may need closer inspection if it:

• hasn't moved for an extended period
• remains on the sand for several days
• is lying upside down and unable to right itself

If you're unsure, gently remove it from the aquarium and smell the shell.

A strong, unpleasant odour is a clear sign the snail has died and should be removed immediately.

You may also notice other members of the Clean Up Crew, such as zombie snails, gathering around it. This is a natural part of the ecosystem, but the decomposing snail should still be removed to prevent excess nutrients entering the water.

Watch for Declining Corals

Corals can also become a source of excess nutrients if they begin to die.

Leather corals naturally close up from time to time, particularly when shedding their outer layer, so short periods of retraction are normal.

However, monitor corals carefully if you notice:

• prolonged sagging or collapse
• remaining closed for several days without improvement
• tissue breaking down or showing signs of necrosis

If a coral is clearly deteriorating, remove it as soon as possible to minimise the release of nutrients into the aquarium.

Algae Is a Symptom, Not the Problem

If you experience a nutrient spike, the first thing you'll usually notice is an increase in algae.

Brown diatoms, cyanobacteria, or other nuisance algae can appear on the sand, rocks, or glass.

While it may not look appealing, the algae is actually absorbing excess nutrients from the water. In many ways, it's the aquarium's natural response to an imbalance.

Once the source of the nutrients has been removed, the ecosystem will gradually recover.

Helping the Aquarium Recover

After removing the source of the nutrient spike, continue with your normal maintenance routine.

You may find it helpful to:

• turn over the sand bed more frequently
• clean algae from the rocks and glass
• allow your Clean Up Crew to continue grazing naturally

Over time, the excess nutrients will be consumed, algae growth will decline, and the aquarium will return to its normal balance.

Daily Observation Prevents Bigger Problems

One of the best habits you can develop as a reef keeper is simply spending a minute observing your aquarium each day.

Checking your snails, corals, fish, and overall reef condition allows you to spot small changes before they become larger problems.

With regular observation and prompt action when something doesn't look right, your Living Oceans aquarium will remain a healthy, stable ecosystem for years to come.