BioSafe GreenClean Granular Algaecide – 20 lbs

BioSafe GreenClean Granular Algaecide (SKU 16002, 20 lbs) is an EPA-registered, OMRI-listed contact algaecide formulated with Sodium Carbonate Peroxyhydrate (42.50%) — a peroxygen oxidizer that destroys algae cells on contact through rapid oxidation. You can see it working within 60 seconds: the granules produce visible bubbling and bleaching on contact with algae. Full results (complete algae death and clearing) appear within 24–48 hours. GreenClean works without copper, chlorine, or phosphate — leaving no heavy metal residues in the pond. As it breaks down, it releases oxygen into the water. The 20 lb container treats up to 40,000 gallons at the shock (curative) application rate of 1 cup per 1,000 gallons. Safe for fish and aquatic plants when applied at labeled rates. For best results, apply early morning on a calm, sunny day with water circulation turned off. 16002 — 20 lbs EPA Registered OMRI Listed Sodium Carbonate Peroxyhydrate 42.5% Works in 60 Seconds Copper-Free 40,000 gal Shock Coverage ⚠ DANGER — Read Before Use: GreenClean Granular is corrosive in concentrated form and causes irreversible eye damage. Always wear protective eyewear (goggles or face shield) and chemical-resistant gloves during handling and application. Avoid breathing dust. Harmful if swallowed, inhaled, or absorbed through skin. Keep away from eyes and skin. Wash hands thoroughly after handling. Do not allow undiluted granules to contact eyes, skin, or clothing. ⚠ This pesticide is toxic to birds. Per EPA-registered label: do not contaminate water when cleaning equipment. Do not allow rinsate from equipment to enter storm drains or natural waterways. Not intended for use in drinking water. Not approved for all uses in all states — verify local regulations before purchase. ⚠ Non-target plant caution: Concentrated, undiluted granules will cause contact burn if accidentally spilled on terrestrial or flowering plants. Do not apply in a manner that allows concentrated granules to contact dry plant tissue. If spilled, sweep up or rinse immediately with water. Key Features & Benefits ⚡ Contact Kill — Visible in 60 Seconds Sodium Carbonate Peroxyhydrate delivers an immediate oxidation reaction on contact with algae — you'll see bubbling and bleaching within 60 seconds of application. Full kill and visible clearing occur within 24–48 hours. This contact-kill mechanism is distinct from algaestatic products that merely slow growth. 🚫 No Copper — No Heavy Metal Residues Unlike many algaecides, GreenClean contains zero copper, chlorine, or phosphate. It leaves no heavy metal residues that accumulate in pond sediment over time and can become toxic to sensitive fish (koi, goldfish) and invertebrates. As GreenClean biodegrades it releases oxygen — a net benefit to pond dissolved oxygen levels. ✅ EPA Registered + OMRI Listed GreenClean is a federally registered pesticide (EPA Est. No. 067441-IL-001) — meaning it has been independently tested and verified effective and properly labeled. OMRI (Organic Materials Review Institute) listing means it's approved for use in certified organic contexts. Both designations validate the chemistry and usage claims. 🎯 Curative and Preventive Use At the higher shock rate (1 cup/1,000 gallons), GreenClean eliminates existing algae blooms. At the lower preventive rate (3 tablespoons/1,000 gallons), it maintains algae control between treatments. Both string algae (filamentous) and blue-green algae (planktonic) are targeted. Apply with bacteria/enzyme treatments for comprehensive pond management — always apply GreenClean first, then wait before adding bacteria. 🌊 Ideal for Waterfalls & Rock Surfaces The granular format allows direct spot application to exposed waterfall rock faces, streambed stones, and pond edges — exactly where string algae concentrates. Turn off the pump, apply granules directly onto the algae, let sit 10–20 minutes while the oxidation reaction works, then restore circulation to flush dead material through the filter. 🐟 Fish-Safe When Used as Directed GreenClean can be applied while fish are present in the pond, provided it is used at labeled application rates. Do not exceed labeled doses — the oxidation reaction temporarily raises dissolved oxygen (beneficial) but overdosing can stress fish. Use extra caution in very warm water above 85°F or in heavily stocked ponds where dissolved oxygen may already be lower. Technical Specifications Specification Value SKU 16002 Weight 20 lbs Active Ingredient Sodium Carbonate Peroxyhydrate — 42.50% Action Mode Oxidation-based contact algaecide (peroxygen chemistry) Volume Conversion 1 lb = 2 cups (20 lbs = 40 cups total) Shock (Curative) Rate 1 cup per 1,000 gallons → 20 lbs treats up to ~40,000 gal Preventive Rate 3 tablespoons per 1,000 gallons Working Time Visible in 60 seconds; full results 24–48 hours pH Effect Raises pH up to 1 unit; returns to baseline within ~1 week EPA Status EPA Registered — Est. No. 067441-IL-001 OMRI Status OMRI Listed — approved for organic use Hazard Class DANGER (corrosive when concentrated; causes irreversible eye damage) Fish Safety Safe when used as directed at labeled rates Bird Safety Toxic to birds per EPA label — do not allow rinsate to reach bird-frequented areas Aquatic Plant Safety Safe in water; concentrated dry granules cause contact burn to terrestrial plants Approved Uses Water gardens, koi ponds, ornamental ponds, fountains, waterfalls, bird baths Not For Use In Drinking water; fish tanks; not approved for all uses in California and some other states Application Rates Treatment Type Rate Coverage (20 lb) Shock / Curative (string algae) 1 cup per 1,000 gallons ~40,000 gal per 20 lb pail Preventive Maintenance 3 tablespoons per 1,000 gallons Significantly more treatments Waterfall / Spot Treatment Apply directly onto algae; 10–20 min contact time Use as needed Pond Cleaning (dry pond) Apply to all surfaces; rinse after 10–20 min Not approved in California Conversion: 1 lb GreenClean Granular = 2 cups by volume. Always consult the full product label for complete application instructions. Never exceed labeled rates. How to Apply GreenClean For String Algae on Waterfalls and Streams: Check pH before applying. GreenClean can raise pH up to 1 unit — verify pH is in a safe range for your fish before treatment. Apply early morning on a calm, sunny day. Sunlight and warm temperatures enhance oxidation activity. Turn off all water movement (pump off). Apply granules directly onto algae-covered rocks and surfaces. Wear gloves and protective eyewear. Allow 10–20 minutes contact time while the oxidation reaction completes (you will see visible bubbling and bleaching). Turn circulation back on. Skim dead algae and organic matter from the water surface promptly — allowing it to sink provides nutrients for regrowth. For Green Water (Planktonic Algae): Check pH. Apply early morning. Shock treat at the high curative rate — broadcast granules evenly across the pond surface. Follow up 1–3 times per week at the lower curative rate as needed, combined with beneficial bacteria treatment. Always apply GreenClean first; wait before adding beneficial bacteria or enzyme products. Always read and follow the complete product label. Keep product out of reach of children. Frequently Asked Questions How does GreenClean Granular Algaecide work to kill algae on contact? BioSafe GreenClean uses activated peroxygen chemistry — specifically Sodium Carbonate Peroxyhydrate (42.50% active ingredient) — that creates a powerful oxidation reaction on contact with algae cells. The oxidation immediately disrupts and destroys algae cell walls. You’ll see this working visually through bubbling and bleaching within 60 seconds of application, with full results typically visible within 24 to 48 hours. As the active ingredient biodegrades, it breaks down into sodium carbonate, water, and oxygen — with no copper, chlorine, or phosphate residues left in the pond. Is BioSafe GreenClean safe for koi, goldfish, and aquatic plants? GreenClean is an EPA-registered, OMRI-listed algaecide that is safe for fish and aquatic plants when used as directed at labeled application rates. Do not exceed the labeled dose — the oxidation chemistry that kills algae can also stress fish and aquatic life if applied at too high a concentration. Use extra caution in very warm water (above 85°F) or in heavily stocked ponds where dissolved oxygen may already be lower than ideal. Important: the official EPA-registered label states this pesticide is toxic to birds. Do not allow concentrated granules or equipment rinsate to reach areas frequented by birds. Wear protective eyewear and gloves during all application — concentrated granules are corrosive and cause irreversible eye damage on contact. What is the coverage and dosage for the 20 lb GreenClean bucket? GreenClean Granular has a volume conversion of 1 lb = 2 cups, giving the 20 lb pail a total volume of 40 cups of granules. At the shock (curative) rate of 1 cup per 1,000 gallons for string algae, the 20 lb pail treats approximately 40,000 gallons for a single shock treatment. For ongoing preventive maintenance, the lower rate of 3 tablespoons per 1,000 gallons significantly extends how far the pail goes. For dense or long-established algae mats, re-treatment may be necessary after 24–48 hours. Control is most easily achieved when algae is not yet well established — treat at first sign of growth. How does GreenClean affect the pond's pH levels? GreenClean can temporarily raise pond pH by up to 1 unit after application. Check your pH before treatment — ideally between 6.8 and 7.8 for koi ponds. If your pH is already near the upper end of the safe range (above 8.0), consider a partial water change before treating. The pH elevation returns to baseline on its own within approximately one week as the Sodium Carbonate breaks down further. Applying early in the morning (when water temperature and natural CO₂ levels help buffer pH swings) reduces the impact of the temporary pH rise. What is the best way to apply GreenClean to a waterfall or stream? For waterfalls and streams, turn off the pump first to stop water flow. Apply granules directly onto the exposed algae on rocks and surfaces — wear gloves and eye protection. Allow 10–20 minutes contact time, during which you’ll see visible bubbling and bleaching as the oxidation reaction works. Then turn the pump back on to restore circulation. Skim any dead algae floating on the surface promptly after treatment — dead organic matter that sinks back to the bottom provides nutrients for the next algae bloom. For areas with strong residual algae growth, re-treat as needed. Can GreenClean be used in cold water during winter? GreenClean can be used in colder water, but the oxidation process works significantly faster in warm water above 55°F and in direct sunlight. In cold water, the granules dissolve and react more slowly, reducing immediate visual impact — though the product is still active. GreenClean is an excellent choice for spring pond opening as water warms and algae begins to emerge, before establishing a full bloom. Apply on a sunny morning as temperatures rise for best results after winter dormancy. Why Buy from Pond Pro Direct? Authentic BioSafe Systems products — fresh inventory Expert algae control guidance — call or text (765) 508-4352, Mon–Fri 9am–5pm EST Free shipping on all orders Price match guarantee on identical products 30-day return period on eligible items State availability notice: GreenClean Granular is an EPA-registered pesticide and is not approved for all uses in all states. Not available for some uses in California and may be restricted in other jurisdictions. Always verify local regulations before purchasing. GreenClean Granular is NOT intended for use in drinking water.