OASE BioSmart 10000 Gravity Pond Filter – Mechanical & Biological Filter for Ponds up to 10,000 Gallons
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Description
The OASE BioSmart 10000 (Item 56930) is a high-capacity, flow-through gravity pond filter providing both mechanical and biological filtration for ponds up to 10,000 gallons (decorative/no fish). Three distinct foam zones slow the water progressively, settling suspended particles and providing the biological surface area needed for a complete nitrogen cycle. Water flows in from the pump, passes through the filter zones, and returns to the pond by gravity — no electricity required at the filter itself.
The BioSmart 10000 features a built-in cleaning indicator that signals when maintenance is needed, and a patented cleaning handle system that squeezes debris from the foams without removing them. Open the Gardena-style sludge drain valve to flush the collected waste — the entire cleaning process takes minutes. A built-in thermometer displays live water temperature, and pre-drilled UVC attachment inlets make it easy to add a Vitronic 36 clarifier for green water control and OASE Clear Water Guarantee eligibility.
Pond Capacity by Fish Load
| Fish Load | Max Pond Size | Notes |
|---|---|---|
| No fish / decorative | Up to 10,000 gallons | Water plants, no livestock |
| Goldfish / light load | Up to 5,000 gallons | Moderate stocking density |
| Koi / heavy load | Up to 2,500 gallons | High bioload fish |
Key Features & Benefits
Technical Specifications
| Specification | Value |
|---|---|
| Item Number / SKU | 56930 |
| Filter Type | Flow-through gravity filter — mechanical & biological |
| Max Pond Size (no fish) | 10,000 gallons |
| Max Pond Size (goldfish) | 5,000 gallons |
| Max Pond Size (koi / heavy load) | 2,500 gallons |
| Maximum Flow Rate (inlet) | 2,110 GPH — do not exceed |
| Minimum Flow Rate (inlet) | 1,600 GPH |
| Outlet Size | 2.5” standard / 3” with included Sch40 adapter |
| Inlet Hose Sizes | 0.75”, 1”, 1.25”, 1.5” (metric step fittings included) |
| Sludge Drain Size | 2” with Gardena-style quick-connect fitting |
| Dimensions (L × W × H) | 30” × 22” × 16” |
| Weight | 24 lbs |
| Filter Foams Included | 9 total: 4 Blue (#40975), 2 Green (#40976), 2 Red (#40974) |
| Built-in Thermometer | Yes |
| Venturi Aeration Inlets | Yes — aerator sold separately |
| UVC Attachment Inlets | Pre-drilled — accepts Vitronic 36 (sold separately) |
| Cleaning System | Indicator + compression handles; sludge drain with Gardena fitting |
| Placement Requirement | Minimum 6.6 ft (2 m) from pond edge; at or above pond water level |
| Must Run Continuously | Yes — do not interrupt power to maintain biological colony |
| Recommended Pump | AquaMax Eco Classic 2700 (57621) or AquaMax Eco Premium 3000 |
| Recommended UVC | Vitronic 36 (for Clear Water Guarantee eligibility) |
| Warranty | 3-Year |
The BioSmart 10000 qualifies for the OASE Clear Water Guarantee — water clarity visible to 3 feet depth, guaranteed — when paired with:
- AquaMax Eco Classic 2700 (Item 57621) or AquaMax Eco Premium 3000 pump
- Vitronic 36 UVC clarifier
- Registration at oase-livingwater.com/na/cwg
The Clear Water Guarantee is OASE’s commitment that correctly matched and registered components will deliver measurably clear water — one of the few manufacturer guarantees of this kind in the pond industry.
Installation Overview
- Route the pump outlet hose to the filter inlet — use 1.5” hose for maximum flow with minimum friction loss
- Connect the outlet pipe (3” with included Sch40 adapter) back to the pond, waterfall, or stream return
- Route the sludge drain hose to a suitable waste area (garden bed, drain) with a slight downhill slope
- For UVC: connect the Vitronic 36 to the pre-drilled attachment inlets — no additional tools needed
- Run continuously — allow 4–6 weeks for the biological colony to fully establish
- When the cleaning indicator activates: pull up on the handles to compress the foams, then open the sludge drain to flush waste
What’s Included
- BioSmart 10000 filter housing with pre-installed foams
- 9 filter foams (4 Blue #40975, 2 Green #40976, 2 Red #40974)
- 3” Sch40 outlet adapter
- Metric step inlet fittings (0.75”, 1.25”, 1.5”)
- Sludge drain hose with Gardena-style quick-connect fitting
Frequently Asked Questions
What is the maximum pond size for the BioSmart 10000?
The BioSmart 10000 is rated by OASE for three different pond scenarios:
- Up to 10,000 gallons — decorative pond with no fish
- Up to 5,000 gallons — goldfish pond with moderate stocking
- Up to 2,500 gallons — koi pond or heavily stocked fish pond
Fish produce significantly more biological waste than plants. A koi pond is typically rated at one-quarter the no-fish capacity. If you have a 4,000-gallon koi pond, the BioSmart 10000 is near its biological limit — consider the next size up or add supplemental filtration.
What pump do I need for the BioSmart 10000?
The BioSmart 10000 requires a pump rated between 1,600 GPH (minimum) and 2,110 GPH (maximum) at your actual installation head height.
Do not exceed 2,110 GPH. Pumping more water than the filter can handle causes overflow and can drain your pond. OASE’s official recommended pumps for the BioSmart 10000 are:
- AquaMax Eco Classic 2700 (Item 57621) — primary recommendation
- AquaMax Eco Premium 3000 — alternative for deeper ponds or longer pipe runs
Both pumps are specifically sized for the BioSmart 10000 and are required for OASE Clear Water Guarantee eligibility.
How does the cleaning system work?
The BioSmart 10000 uses a two-step cleaning process that takes just a few minutes and requires no foam removal:
- When the built-in cleaning indicator shows maintenance is needed, pull up firmly on the cleaning handles to compress all 9 filter foams simultaneously — squeezing accumulated debris into the sump area below.
- Attach a garden hose to the Gardena-style fitting on the sludge drain valve, then open the valve to flush the compressed debris out through the drain hose.
- Close the drain valve and resume normal operation. There is no need to open the filter, remove foams, or manually wash anything.
OASE recommends performing this cleaning whenever the indicator activates, typically every few weeks during peak season.
Does the BioSmart 10000 include UV clarification?
The BioSmart 10000 does not include a UV clarifier. However, the filter housing includes pre-drilled UVC attachment inlets designed specifically to accept the Vitronic 36 UVC clarifier (sold separately). No drilling or modification is needed — the Vitronic 36 mounts directly to the filter.
Adding the Vitronic 36 makes the BioSmart 10000 eligible for the OASE Clear Water Guarantee when combined with the recommended AquaMax pump and registered online. The UV clarifier clumps suspended algae cells so the filter foams can trap them, eliminating green water.
Why choose a gravity filter over a pressurized filter?
A flow-through gravity filter like the BioSmart 10000 offers several advantages over pressurized filters for larger ponds:
- Larger biological surface area — the open-flow design accommodates more filter foam volume than a pressurized canister of equivalent footprint.
- Maximum oxygenation — water passes through the filter zones and falls back to the pond with a natural air-water interface, enriching dissolved oxygen levels.
- No pressure constraints — there is no risk of bypassing caused by clogging under pressure, and cleaning is gravity-assisted.
- Ideal for waterfalls and streams — the gravity return outlet connects naturally to a waterfall spillway or stream header for a complete, visible water feature.
The trade-off is placement: the filter must sit at or above pond water level, at least 6.6 ft from the pond edge. A pressurized filter offers more placement flexibility but typically at lower biological capacity for the same price point.
Can I turn off the filter for winter?
You can reduce or stop filtration in winter, but there are important considerations. The BioSmart 10000 must run continuously to maintain its biological colony. If the pump is stopped, the beneficial bacteria that convert ammonia and nitrite will die within 24–48 hours without oxygenated water flow.
In climates where the pond freezes solid and fish are removed or go dormant at the bottom, it is generally safe to stop the filter and clean the foams for storage. In milder climates where fish remain active, the filter should continue running. Restart biological filtration in spring and allow 4–6 weeks for the bacterial colony to re-establish before resuming full fish feeding.
What warranty does the BioSmart 10000 carry?
The OASE BioSmart 10000 is backed by OASE’s 3-Year Warranty. As an authorized OASE dealer, Pond Pro Direct supports this warranty. Contact us at support@pondprodirect.com or (765) 508-4352 with any warranty questions.
Why Buy from Pond Pro Direct?
- Authentic OASE products with full 3-Year Warranty
- Expert filtration sizing support — 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.
Changing Your Shipping Address
Address changes after an order has been processed or shipped may result in delays or additional carrier fees. Any carrier charges associated with address changes are the responsibility of the customer.
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
