API Algaefix Marine 473 ml

Controls many types of algae growth in marine and reef aquariums & will not harm marine fish, corals, or other invertebrates.

Benefits:

• Use weekly to control algae growth and reduce aquarium maintenance
• Will not harm marine fish, corals, or other invertebrates
• Does not discolor water or cause foaming
• EPA registered

Follow API Easy Care Guide and use ALGAEFIX MARINE:

• As part of regular care to reduce aquarium maintenance
• To directly treat and control algae in a saltwater or reef aquarium

MARINE ALGAEFIX effectively controls Green algae, Red Slime, and Brown Algae in marine aquariums containing live corals, invertebrates, and fish. It will not harm coralline algae, discolor water, or cause foaming.

Treats: 1 ml treats 10 U.S. gallons of water or 5 ml for each 50 gallons of water
Directions: Add 1 ml (1/5 tsp) for each 10 U.S. gallons or 5 ml (1 tsp.) for each 50 U.S. gallons of aquarium water. Repeat dose every three days until algae is controlled. Siphon or scrape any dead algae from the aquarium. Once algae growth is under control, add one dose per week. Weekly doses of MARINE ALGAEFIX will control algae growth and reduce aquarium maintenance.It is a violation of federal law to use this product in a manner inconsistent with its labeling. For indoor aquarium use only

Composition & Analysis

Active ingredient. The safety data sheet apifishcare.com links from the Marine AlgaeFix product page lists Polyquaternium-42 (CAS 31512-74-0) at 4.5% by weight as the sole active ingredient, the same compound and concentration used across API’s AlgaeFix range; the document itself names “API Marine Algaefix” among the products it covers, alongside the freshwater and pond versions.

What that means in the tank. As supplied it’s a clear, pale yellow liquid, fully miscible with water, pH 5.8 to 6.8, consistent with the label’s small per-gallon dose not being expected to shift tank pH in normal use.

Freshness & Storage

Every batch we dispatch carries a minimum of 6 months’ remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number, or email us if you would rather, and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 48 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.