90311SKR | SeaKlear 90 Day Algaecide Algae Prevention & Remover 1 Gallon

The SeaKlear 90-Day Algae Prevention & Remover (1 Gallon, SKU 90311SKR) is a highly concentrated algaecide formulated to kill and prevent multiple algae types—including blue-green, green, yellow and black—for up to three months per treatment when used in properly balanced pool water. Featuring a low-dose copper complex (approx. 11.8% copper sulfate pentahydrate, 3% elemental copper) it delivers long-term residual protection, is non-foaming and non-staining when applied as directed. This product is ideal for service professionals or informed DIYers seeking a “set-and-forget” algaecide for their pool water maintenance every 90 days.

Highlights

• Extended Algae Control Cycle: One application lasts up to 90 days and includes a no-algae guarantee when used per instructions in properly balanced pool water.

• Broad-Spectrum Algae Efficacy: Targets and prevents blue-green, black, yellow, mustard, and traditional green algae—delivering versatile performance across algae types.

• Non-Foaming, Non-Staining Formula: Designed to maintain clarity and appearance of surfaces without causing foam build-up, pool liner marks, or other staining when used as directed.

• Low-Dose Copper Complex: Formulated with approximately 11.8% copper sulfate pentahydrate (~3% elemental copper) for sustained residual protection and proven performance.

• Economical & Simplified Treatment: Routine dosage is only 16 fl oz per 10,000 gallons every three months, reducing maintenance frequency and simplifying your service schedule.

Directions for Use

Dosage Rates

Every 3 Months (Algae Prevention)

Use 16 fl oz of SeaKlear Algae Prevention & Remover for every 10,000 gallons of pool water
(or 500 ml per 40,000 L).

Severe Algae Treatment

Use 32 fl oz of SeaKlear Algae Prevention & Remover for every 10,000 gallons of pool water
(or 1 L per 40,000 L).

General Directions

• Keep pool water pH between 7.2 and 7.8.

  • For severe algae, lower pH to 7.2.

• Maintain total alkalinity between 80–120 ppm.

• Make sure the pool’s filtration system is running properly.

• Brush the pool regularly.

• Calculate how much product your pool needs based on its volume.

• Add the product directly into the deep end, ideally near a return line.

  • For pools with plaster finishes, dilute the product in a bucket of pool water before adding.

• This product must be used together with an EPA-registered sanitizer (like chlorine) to help control bacteria.

Additional Info

This section provides answers to the most common questions customers ask in store about the SeaKlear 90-Day Algae Prevention & Remover (90311SKR). It explains how this long-lasting copper-based formula works, how to apply it correctly, and what to know before visiting Discount Pool Mart to pick up your seasonal algaecide. Use it to ensure you purchase the right product for three-month algae control.

Compatibility, Pool Balance & Algae Prevention

SeaKlear 90-Day Algaecide is designed for pools that need reliable, long-term algae prevention using a low-dose copper complex. These answers help customers confirm compatibility before purchasing in store.

How can I confirm this 90-day algaecide is compatible with my pool?

SeaKlear’s copper-based formula works with chlorine, salt, and mineral systems, and is safe for plaster, vinyl, fiberglass, and pebble finishes. Proper water balance—especially pH and total alkalinity—is important for preventing staining and ensuring optimal performance. Staff at Discount Pool Mart can help you verify your chemistry before application.

Will this treat all common algae types in my pool?

Yes, this formula is designed to target green, blue-green, yellow/mustard, and even black algae. For pools that experience recurring blooms, customers often pair this algaecide with brushing and shock during the initial treatment.

Does the 90-day treatment really last three months?

When water is properly balanced and circulation is functioning, the copper complex remains active for the full 90-day cycle. Heavy rains, high bather load, or neglected chemistry may shorten duration.

Application, Dosage & Water Maintenance

These answers help customers understand how to apply SeaKlear 90311SKR and what to expect after dosing.

How much product do I need for my pool size?

The standard dosage is 16 fl oz per 10,000 gallons every 90 days. For a 20,000–30,000 gallon pool, most customers purchase one gallon to complete multiple seasonal treatments. Accurate gallonage ensures proper performance.

Is this product safe for vinyl liners and colored surfaces?

Yes, when used as directed and applied to balanced water. Maintaining pH between 7.2–7.6 prevents the copper from precipitating on surfaces, ensuring a non-staining experience.

Do I have to shut down the pool after application?

No downtime is required. Add the product near a return jet while the pump is running, and the pool can be used shortly afterward.

In-Store Pickup & Seasonal Planning

These questions help customers time their purchase and prepare for long-term algae prevention.

Is SeaKlear 90311SKR available for same-day pickup at Discount Pool Mart?

Most stores keep this product stocked during spring, summer, and fall. Calling ahead with the SKU helps confirm stock before you arrive.

When should I apply my 90-day dose for the best results?

Customers often add the product at the beginning of each season or after major cleanings. Applying before peak heat helps prevent algae before it establishes.

Should I pair this with other chemicals during pickup?

Yes, for best results customers typically purchase shock, brush attachments, and test kits during the same visit to support proper water balance.