API Marine AlgaeFix 16oz – Saltwater & Reef Aquarium Algae Control

About This Product

The API Marine AlgaeFix 16oz is a powerful aquarium algae control treatment specially formulated to combat unwanted algae growth in saltwater and reef aquariums. Designed by API, a trusted name in aquarium care, this fast-acting liquid treatment helps control green algae, red slime, and brown algae while maintaining a cleaner, clearer, and more attractive marine environment.

Unwanted algae growth is a common challenge in saltwater aquariums, particularly in systems experiencing excess nutrients, prolonged lighting periods, or accumulated organic waste. Algae can spread across aquarium glass, rockwork, decorations, and other surfaces, reducing visibility and affecting the overall appearance of a reef display.

API Marine AlgaeFix works by controlling susceptible algae populations, helping aquarists manage existing algae problems and reduce recurring growth. Its specialized formula is designed specifically for saltwater environments containing marine fish, corals, and other invertebrates.

According to API, Marine AlgaeFix can be used safely in established marine and reef aquariums containing fish, hard and soft corals, shrimp, snails, clams, anemones, and other invertebrates when used exactly as directed.

Unlike some aquarium treatments, Marine AlgaeFix does not discolor aquarium water or cause foaming under normal recommended use. Its convenient liquid formula allows accurate dosing based on aquarium volume, making it suitable for small reef systems and larger marine aquariums alike.

For active algae problems, the treatment is added every three days until algae growth is controlled. Once the aquarium is clear, weekly maintenance dosing helps prevent excessive algae growth from returning.

Each 16oz (473ml) bottle treats up to approximately 4,800 US gallons at the standard dosage, providing an economical solution for marine aquarium algae management.

Whether you’re maintaining an established mixed reef, an SPS or LPS coral aquarium, or a saltwater fish-only system, API Marine AlgaeFix offers a convenient approach to controlling unwanted algae and maintaining a beautiful underwater display.

Features:

• Specially formulated for marine aquariums controls unwanted algae growth in saltwater and reef environments.
• Effective green algae control helps manage susceptible green algae species, including Cladophora.
• Targets red slime growth including certain cyanobacteria commonly referred to as red slime algae.
• Controls brown algae including susceptible brown algal growth found in marine aquariums.
• Manufacturer-rated reef-safe formula designed for use around marine fish, corals, and invertebrates when used as directed.
• Compatible with soft and hard corals according to the manufacturer’s labeled use instructions.
• Suitable for many marine invertebrates including shrimp, snails, clams, anemones, and other reef inhabitants when used correctly.
• Helps maintain clear aquarium glass by controlling unwanted algae accumulation.
• Reduces algae growth on decorations and rockwork for a cleaner, more attractive marine display.
• Fast-acting algae treatment provides targeted control of susceptible nuisance algae.
• Does not discolor aquarium water when used according to manufacturer directions.
• Non-foaming formulation helps maintain a clean aquarium appearance.
• Simple liquid dosing allows accurate treatment based on aquarium water volume.
• Repeat treatment every three days until existing algae growth is controlled.
• Weekly maintenance dosing helps manage recurring algae growth and reduce routine cleaning.
• Concentrated 16oz bottle provides up to approximately 4,800 gallons of treatment at the standard dosage.
• EPA-registered algae control product formulated for labeled marine aquarium applications.

Specifications:

• Brand: API (Aquarium Pharmaceuticals)
• Product name: Marine AlgaeFix
• Product type: Saltwater aquarium algae control treatment
• Product size: 16 fl oz (473ml)
• Form: Liquid
• Primary function: Control of unwanted marine aquarium algae
• Target organisms: Green algae, red slime cyanobacteria, and brown algae
• Active ingredient: Polyoxyethylene(dimethylimino)ethylene (dimethylimino)ethylene dichloride
• Active ingredient concentration: 4.50%
• Other ingredients: 95.50%
• Standard dosage: 1ml per 10 US gallons (38 liters)
• Alternative dosage: 5ml per 50 US gallons (190 liters)
• Initial treatment frequency: Every 3 days until algae is controlled
• Maintenance frequency: Once weekly
• Treatment capacity: Approximately 4,800 US gallons per 16oz bottle
• Aquarium compatibility: Saltwater and marine reef aquariums
• Coral compatibility: Hard and soft corals when used as directed
• Marine invertebrate compatibility: Manufacturer-labeled for use with compatible marine shrimp, snails, clams, anemones, and other invertebrates
• Freshwater application: Use the separately labeled freshwater API AlgaeFix product
• Water discoloration: Not expected when used as directed
• Foaming: Not expected when used as directed
• Recommended application: Marine algae treatment, reef aquarium algae management, and routine algae growth control

Dosage Instructions:

Standard Treatment

Use 1ml of API Marine AlgaeFix for every 10 US gallons of aquarium water.

Aquarium Volume	Recommended Dosage
10 gallons	1ml
20 gallons	2ml
30 gallons	3ml
50 gallons	5ml
75 gallons	7.5ml
100 gallons	10ml
150 gallons	15ml
200 gallons	20ml
300 gallons	30ml
500 gallons	50ml

Treatment Procedure

1. Determine aquarium water volume: Calculate the approximate actual water volume, accounting for displacement by rockwork, substrate, and equipment.
2. Prepare the aquarium: Clean accessible algae from aquarium glass and decorations before treatment.
3. Measure the correct dosage: Use the bottle’s dosing cap or an accurate measuring device to add 1ml for every 10 gallons of aquarium water.
4. Administer the treatment: Add the measured amount according to the product label.
5. Repeat every three days: Continue treatment at three-day intervals until algae growth is controlled.
6. Remove dead algae: Siphon or scrape away dead and dying algae to reduce the accumulation of decomposing organic material.
7. Begin maintenance dosing: Once algae growth is controlled, apply the standard dosage once per week to help prevent recurring problems.

Maintenance Recommendations:

For the best long-term results, combine API Marine AlgaeFix treatment with good aquarium husbandry practices.

• Maintain stable nitrate and phosphate concentrations appropriate for your reef aquarium.
• Avoid excessive feeding and remove uneaten food before it decomposes.
• Use efficient mechanical and biological filtration to manage accumulated waste.
• Maintain an appropriate daily aquarium lighting schedule.
• Remove dead and dying algae during treatment to limit nutrient recycling.
• Maintain adequate water circulation and gas exchange throughout the aquarium.

Important Product Information:

API Marine AlgaeFix is intended for established saltwater and reef aquariums. Follow the current product label and use only in aquariums that meet its stated requirements.

Never exceed the recommended dosage or increase treatment frequency beyond the manufacturer’s instructions.

Although API identifies Marine AlgaeFix as compatible with marine fish, corals, and invertebrates when used as directed, aquarium organisms can vary in sensitivity. Monitor livestock closely during treatment and maintain adequate aeration, particularly when a significant quantity of algae is dying.

Marine AlgaeFix is an algae control treatment, not a replacement for appropriate nutrient management, water testing, and routine aquarium maintenance.

Safety Warning: Harmful if swallowed or absorbed through the skin and can cause eye irritation. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling and keep out of reach of children and pets.

Recommended application: A concentrated marine aquarium algae control treatment ideal for established saltwater and reef aquariums experiencing unwanted green algae, red slime, or brown algae growth. Helps maintain a cleaner aquarium and reduces recurring algae maintenance when used according to manufacturer instructions.