BioSafe GreenClean Granular Algaecide – 8 lbs
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Description
Causes irreversible eye damage. Do not get in eyes, on skin, or on clothing. Wear protective eyewear (goggles, face shield, or shielded safety glasses) during application. Harmful if swallowed, inhaled, or absorbed through skin. Avoid breathing dust. Wash hands thoroughly after handling. Keep out of reach of children. EPA Reg. No. 70299-4.
BioSafe GreenClean Granular Algaecide – 8 lbs (SKU 16004) is a fast-acting, EPA-registered, OMRI-Listed granular algaecide that eliminates string algae, blanket weed, and filamentous algae on contact through activated peroxygen (Sodium Carbonate Peroxyhydrate 42.50%) oxidation chemistry. Visible results — bubbling, bleaching, and algae discoloration — begin within minutes of application. The 8 lb container covers up to 16,000 gallons at the curative rate and up to ~64,000 gallons at the preventative rate.
Biodegrades into water and oxygen, leaving no copper residues or persistent chemical accumulation. Safe for fish and aquatic plants at labeled rates. Pond water remains usable without interruption following treatment.
Dosing Quick Reference — 8 lb Container
Note: 1 lb GreenClean Granular = 2 cups by volume per BioSafe label.
For active algae blooms
Every 2–4 weeks to prevent re-growth
Key Features & Benefits
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 16004 |
| Weight | 8 lbs |
| Active Ingredient | Sodium Carbonate Peroxyhydrate 42.50% |
| Other Ingredients | 57.50% |
| EPA Registration | EPA Reg. No. 70299-4 |
| OMRI Listed | Yes — certified for organic use |
| Signal Word | DANGER — Corrosive; causes irreversible eye damage |
| Mode of Action | Oxidation (activated peroxygen chemistry) |
| Weight Conversion | 1 lb = 2 cups by volume |
| Curative Coverage | ~16,000 gallons (1 cup per 1,000 gal) |
| Preventative Coverage | ~64,000 gallons (¼ cup per 1,000 gal) |
| Bird Toxicity | Toxic to birds in raw form per EPA label — keep birds away until fully dissolved |
| Fish Safety | Safe at labeled rates; ensure good aeration during heavy algae treatment |
| State Note | Pond Cleaning use not approved in California per label |
GreenClean Granular Size Family
| Size | SKU | Curative Coverage | Preventative Coverage |
|---|---|---|---|
| 8 lbs ← This | 16004 | ~16,000 gal | ~64,000 gal |
| 20 lbs | 16002 | ~40,000 gal | ~160,000 gal |
Application Tips for Best Results
- Apply early in the morning under calm, sunny conditions — sunlight and warm water enhance oxidation activity
- Test pH before applying — GreenClean can raise pH up to 1 unit; avoid applying when pH is already high (above 8.5 in koi ponds)
- Skim dead algae promptly after treatment — sinking dead matter becomes nutrients that fuel the next algae bloom
- Waterfall treatment: turn off pump, apply granules to moist algae, wait 20 minutes, restart pump
- Pond broadcast treatment: apply directly over infested areas or broadcast across pond surface
- Increase aeration during heavy algae removal — rapid organic decomposition can temporarily reduce dissolved oxygen
- Combine with bacteria: follow GreenClean treatment with beneficial bacteria (EcoFix, Pond Support) to consume dead algae and reduce nutrients — always apply GreenClean first
- California customers: Pond Cleaning use is not approved in California per the product label
Frequently Asked Questions
How does GreenClean Granular work to eliminate string algae?
BioSafe GreenClean utilizes activated peroxygen chemistry — specifically Sodium Carbonate Peroxyhydrate (42.50%) — that begins working on contact with wet algae. Through a powerful oxidation process, it breaks down the cellular structure of algae, with effects immediately apparent as bubbling and bleaching/discoloration of algae tissue. You'll see visible activity within minutes of application.
After the oxidation reaction completes, the active ingredient biodegrades into water and oxygen — leaving no persistent chemical residues in your pond. This makes GreenClean both effective and safe for repeated seasonal use without copper accumulation.
Is BioSafe GreenClean safe for fish, plants, and aquatic wildlife?
GreenClean is EPA-registered (Reg. No. 70299-4) and OMRI-Listed for use in ponds containing fish, plants, and aquatic life at labeled rates.
Fish and aquatic plants: Safe at labeled application rates. Ensure good aeration is running during and after heavy algae treatments — rapid organic decomposition can temporarily reduce dissolved oxygen. Do not overdose.
Birds: The EPA label states "This pesticide is toxic to birds" in raw granular form. Keep birds away from the application area until granules are fully dissolved and dispersed in pond water. Once diluted at labeled rates, risk to wildlife is low.
Pets and local wildlife: Safe when used as directed at labeled concentrations. Pond water after treatment can continue to be used normally.
What is the coverage area for an 8 lb bucket of GreenClean?
Per the BioSafe label: 1 lb GreenClean Granular = 2 cups by volume. The 8 lb container provides 16 cups total.
- Curative (active algae outbreak): 1 cup per 1,000 gallons → 8 lbs covers approximately 16,000 gallons
- Preventative maintenance: ¼ cup per 1,000 gallons → 8 lbs covers approximately 64,000 gallons
For heavy infestations, a curative dose can be repeated 1–3 times per week until the bloom is controlled, then transition to the preventative schedule every 2–4 weeks.
Can GreenClean be applied directly to rocks and waterfalls?
Yes — waterfall and rock surface treatment is one of GreenClean's strongest use cases. Because it's a granular contact product, it works best when applied directly to algae on physical surfaces.
Recommended waterfall treatment procedure:
- Turn off the pump and allow waterfall flow to stop
- Apply GreenClean granules directly onto the moist algae-covered rocks and surfaces
- Leave product in place for 20 minutes to maximize contact-kill
- Restart the pump — water will flush treated areas and carry dissolved product into the pond
Will GreenClean affect the pH of my pond water?
Yes — GreenClean can temporarily raise pond pH by up to 1 full pH unit. This is significant for koi ponds where pH stability matters. The pH recovers on its own within approximately one week as the active ingredient fully degrades.
To minimize pH impact: test your pond pH before each application; apply in the early morning when pH is naturally at its lowest point (CO₂ from overnight respiration keeps morning pH lower than afternoon); avoid treating more than one-third of the pond surface at once during heavy algae blooms to prevent acute oxygen depletion from rapid decomposition.
How often should I apply GreenClean for preventative maintenance?
For ongoing prevention once algae is under control: apply at the preventative rate (¼ cup per 1,000 gallons) every 2–4 weeks throughout peak season. This regular lower-dose application prevents algae spores from establishing before they can form visible mats or blooms.
For best seasonal results, combine GreenClean with a beneficial bacteria program (such as API EcoFix or Aqua Meds products). Apply GreenClean first to eliminate existing algae, then add bacteria to consume dead organic matter and reduce the phosphate and nutrients that fuel re-growth. Always apply GreenClean before bacteria treatments — not simultaneously.
Why Buy from Pond Pro Direct?
- Authentic BioSafe Systems products — fresh, verified inventory
- Expert algae treatment 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
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.
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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
