Aquascape 91005 Ultra 400 GPH Submersible Pond Pump – Small Waterfall & Fountain Replacement Water Pump
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Description
The Aquascape Ultra 400 (91005) is a compact mag-drive submersible pump delivering up to 370 GPH against a maximum head of 7.55 feet. At 24 watts, it’s one of the most energy-efficient pumps in its flow class — drawing only 0.40 amps for continuous 24/7 operation. The pump connects to a standard 115V outlet with a 12-foot cord and includes a 1/2” valve, threaded elbow, and multi-hose fitting compatible with 1/2”, 3/4”, 1”, and 1.25” pipe — adaptable to nearly any small pond or fountain plumbing setup.
The durable pre-filter cage with sponge protects the impeller from debris, and the locking cage design allows quick removal for cleaning without tools. A wide, flat base with rubber feet stabilizes the pump and reduces vibration on pond floors. Oil-free mag-drive design ensures no contamination of pond water. For freshwater ponds, fountains, and external filter applications only. Backed by a 3-year limited warranty.
Key Features & Benefits
What’s Included
- Aquascape Ultra 400 pump with pre-filter cage and sponge
- Multi-hose fitting — compatible with 3/4”, 1”, and 1.25” pipe
- 1/2” flow control valve — adjustable for spitting ornaments and fountain heads
- Threaded 90° elbow — routes discharge in any direction
- 12-foot power cord (115V / 60Hz)
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 91005 |
| Max Flow Rate | 370 GPH |
| Max Head Height | 7.55 ft (7.5 ft) |
| Motor Type | Mag-Drive (magnetic drive) |
| Wattage | 24 Watts |
| Amperage | 0.40 Amps |
| Voltage | 115V / 60Hz |
| Cord Length | 12 feet |
| Discharge Sizes | 1/2”, 3/4”, 1”, 1-1/4” |
| Optimum Pipe Diameter | 1/2” – 1” |
| Pump Dimensions | 5.5” × 4” × 3.5” (L × W × H) |
| Installation | Submersible; freshwater only; no chlorine or bromine |
| Fish Safety | Oil-free; fish and plant safe |
| Warranty | 3-year limited |
Aquascape Ultra Pump Family
| Model | SKU | Max GPH | Best For |
|---|---|---|---|
| Ultra 400 ← This | 91005 | 370 | Decorative fountains, spitting ornaments, small ponds <500 gal |
| Ultra 550 | 91006 | 520 | Small ponds, low-head waterfalls |
| Ultra 800 | 91007 | 800 | Small-medium ponds, moderate waterfall returns |
| Ultra 1100 | 91008 | 1100 | Medium ponds, external filter supply |
| Ultra 1500 | 91009 | 1500 | Medium-large ponds and waterfall systems |
| Ultra 2000 | 91010 | 1982 | Large ponds, high-flow waterfall returns |
All Ultra pumps are mag-drive, oil-free, freshwater-only, and backed by a 3-year limited warranty. All use the same pre-filter cage design and similar fitting kits.
Frequently Asked Questions
What is the maximum flow rate and head height of the Aquascape Ultra 400?
The Aquascape Ultra 400 (91005) has a maximum flow rate of 370 GPH and a maximum head height of 7.55 feet. Note: flow decreases as head height increases. At 3 feet of head (a common small waterfall height), expect considerably less than 370 GPH — consult the pump curve for your specific installation height. For best performance, keep installation head below 5 feet. The “400” in the name refers to the series designation, not a 400 GPH guarantee.
Is the Aquascape 91005 energy efficient?
Yes. The Ultra 400 uses mag-drive technology, drawing only 24 watts (0.40 amps) continuously. Running 24/7 at $0.15/kWh, annual operating cost is approximately $31 — far less than comparably powered conventional pump motors with mechanical shaft seals. The oil-free mag-drive design also eliminates the thermal inefficiency of friction-based conventional motor seals.
What size tubing and fittings are compatible with the Ultra 400?
The included fitting kit is compatible with 1/2”, 3/4”, 1”, and 1.25” pipe diameters. The kit includes a 1/2” flow control valve (for spitting ornaments and fountain heads), a 90° threaded elbow (for directional discharge), and a multi-hose fitting that adapts to each pipe size. Aquascape’s optimum pipe diameter recommendation is 1/2”–1” for this pump — using the largest available tubing reduces friction head loss and maximizes effective flow rate at your installation height.
How do I maintain the Aquascape Ultra 400 to prevent clogging?
The pre-filter cage sponge catches debris before it reaches the impeller. Rinse the sponge regularly during the season (monthly as a baseline; more frequently in ponds with heavy plant debris or fish load). The locking cage design allows tool-free removal — pull up on the cage to unlock, remove the sponge, rinse under clean water, and reinsert. If flow drops despite a clean sponge, remove the entire cage and inspect the impeller for debris wrapped around the magnet. An annual pump cleaner soak helps dissolve mineral scale from the impeller and volute.
Is this pump safe for fish and aquatic plants?
Yes. The oil-free magnetic drive design ensures no lubricant can contaminate pond water, making it completely safe for koi, goldfish, and aquatic plants. Aquascape specifies the Ultra pump for freshwater use only — it should not be used in water containing chlorine, bromine, or other corrosive chemicals (pool water, hot tub water). For standard freshwater pond environments, the Ultra 400 is fish-safe and suitable for continuous 24/7 operation.
Can the Ultra 400 Pump be used outdoors during the winter?
The pump can continue running in cold water above freezing — mag-drive motors handle cold temperatures without issue and continuous operation actually helps prevent ice formation around the pump area. However, if the pond surface is likely to freeze entirely, remove the pump before freeze-up: ice expanding around a submerged pump can damage the impeller housing and crack the pre-filter cage. For winter storage, remove the pump, rinse with clean fresh water, and store in a frost-free location (a bucket of water indoors prevents the impeller seals from drying out).
Why Buy from Pond Pro Direct?
- Authentic Aquascape products with 3-year warranty support
- Expert pond pump sizing 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.
Order Confirmation
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
