BioSafe GreenClean Granular Algaecide – 20 lbs
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Description
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.
⚠ 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.
Key Features & Benefits
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.
Price Match
At Pond Pro Direct, we want you to shop with confidence, knowing you’re always getting a good deal.
We will match or beat the lowest online price on its products.
If you find a lower price for any products on our store, we will beat it by $50 for products listed over $2000. In order to be eligible, you must provide proof, whether a screenshot, invoice, email, etc. of the lower offer.
Please note that this does not apply to every product in the store, so reach out via email or chat for confirmation before purchasing.
For the policy to apply, simply send us a screenshot, link, or any other proof of the lower price.
For more information, please check out Price Match Policy Page
Shipping & Delivery
Order Processing
Orders are processed within 1–5 business days, depending on product type, brand, and fulfillment method. Products sold on Pond Pro Direct ship directly from manufacturers or authorized distribution partners and do not ship from a single centralized warehouse.
Processing times may vary by brand, item type, fulfillment method, and whether an item is made to order or ships via freight.
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After placing your order, you will receive an order confirmation email confirming that we have received your order and pre-authorized your payment method.
Once your order is received, we contact the manufacturer or distribution partner to confirm availability and fulfillment timelines.
- If an item is unavailable or on backorder, we will notify you by email and void the pre-authorization.
- If the item is available, the payment will be processed and the order submitted for shipment.
Order Shipment
If your order is in stock and payment is processed, it will typically ship within 6–13 business days. Once your order ships, tracking information (when available) will be sent to the email address provided at checkout.
If you do not receive shipping confirmation within 6 business days, please contact us at support@pondprodirect.com.
Shipping Destinations
At this time, we primarily ship within the United States. Some products may be available for shipment to Canada. If the website allows checkout and accepts your shipping address, the product is eligible for delivery to that location.
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Shipping Times
All shipping times are estimates only and not guarantees.
- Typical handling time: 1–5 business days
- Typical transit time after shipment: 5–8 business days
- Estimated delivery window: 6–13 business days
Delivery timelines may vary based on brand, item type, production status, freight requirements, and carrier availability.
If an order is cancelled after it has been processed or shipped, the customer may be responsible for applicable shipping charges, freight fees, carrier return fees, and warehouse handling costs, where applicable.
Shipping Options
Available shipping options vary by product and location.
Our standard Curbside Delivery option is provided at no additional cost where applicable and delivers the item to the curbside or driveway of the delivery address.
Additional options, such as Threshold Delivery or White Glove Delivery, may be available for select products and locations.
For full details regarding freight delivery, inspection requirements, liftgate service, returns, and customer responsibilities, please review our full Shipping Policy page.
Returns & Refunds
Cancellations & Refunds
Orders may be canceled free of charge before shipment, unless the item is classified as Custom or Made-to-Order (see below).
If you have questions about your order, please contact us at support@pondprodirect.com or call (765) 508-4352 during business hours.
Cancellations (Before Order Ships)
If you need to cancel an order before it ships, please contact us as soon as possible. Orders canceled prior to shipment are eligible for a full refund.
You can reach our team by phone at (765) 508-4352, via live chat on our website, or by email at support@pondprodirect.com.
Cancellations (After Order Ships)
Once an order has shipped or entered fulfillment, it may no longer be eligible for cancellation. If you no longer wish to keep the item, you must wait until delivery and then request a return.
A Return Merchandise Authorization (RMA) is required before returning any item.
Custom or Made-to-Order Items
Custom or made-to-order products are produced specifically for your order and cannot be canceled or refunded once production has begun, except in cases of defect or error.
Product pages will clearly indicate when an item is custom or made-to-order. If you are unsure whether an item falls into this category, please contact us before placing your order.
Returns & Refunds
Returns are subject to the following conditions:
- Customers have 30 days from delivery to request a return, unless otherwise stated on the product page or by manufacturer policy
- Items must be unused, uninstalled, and in original packaging
- An RMA is required prior to returning any item
Because we ship products directly from manufacturers, return eligibility may vary by brand. If a manufacturer does not permit returns on a specific product, we may be unable to accept the return. Please contact us if you would like confirmation of return eligibility for a specific item.
Fees & Shipping Costs
- Return shipping costs are the responsibility of the customer unless the item is defective or shipped in error
- Freight / LTL shipments may incur higher return shipping costs due to carrier fees
- Approved returns of non-defective items may be subject to a restocking fee of up to 25%
- Original outbound shipping charges are non-refundable
If you are exchanging an item rather than returning it outright, we may be able to assist with some costs depending on the product and manufacturer.
For full details, including freight deliveries, damage reporting requirements, and manufacturer-specific terms, please review our complete Return and Refund Policy
