UltraClear Biological Pond Clarifier – 32 oz | Natural Sludge & Algae Treatment
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Description
UltraClear Biological Pond Clarifier – 32 oz (SKU 041000, MPN 41000) is a liquid beneficial bacteria treatment that improves pond water clarity by completing the nitrogen cycle — converting toxic ammonia and nitrite into harmless nitrogen gas and consuming the phosphate that fuels algae growth. Unlike chemical flocculants that only temporarily clump particles, the biological bacteria in UltraClear Clarifier provide long-term water quality improvement by addressing the root nutrient causes of cloudy, algae-prone water. One 32 oz bottle treats 80,000 gallons at the standard dose of 1 oz per 2,500 gallons.
For ponds also dealing with bottom sludge and heavy organic accumulation (leaves, fish waste, muck), pair with UltraClear Sludge Digester — the two products work on complementary aspects of pond health and can be used together as a complete biological management system.
How UltraClear Biological Clarifier Works — The Nitrogen Cycle
Dosing Schedule
Application: Dilute measured dose with 2–3 gallons of pond water, then pour evenly along the pond perimeter for good distribution. Shake bottle well before measuring.
Key Features & Benefits
UltraClear Biological Clarifier vs. Sludge Digester — Which Do You Need?
| Feature | Biological Clarifier (This — SKU 041000) | Sludge Digester (SKU 47125) |
|---|---|---|
| Primary target | Dissolved nitrogen compounds, phosphate, suspended nutrients | Bottom sludge, muck, organic sediment |
| Bacteria types | Nitrifying (chemolithotrophic) + heterotrophic | Heterotrophic + enzymatic, including facultative anaerobes |
| Works in | Water column + filter media | Bottom of pond (aerobic and anaerobic zones) |
| Reduces | Ammonia, nitrite, nitrate, phosphate, algae-fueling nutrients | Sludge, muck, leaf litter, fish waste deposits |
| Dose | 1 oz / 2,500 gal — weekly | 1 oz / 1,000 gal — monthly to weekly |
| Best for | New ponds, algae prevention, cloudy water, filter seeding | Established ponds with heavy bottom accumulation |
| Use together? | ✅ YES — UltraClear recommends both for ponds with heavy organic loads | |
Technical Specifications
| Specification | Value |
|---|---|
| SKU / MPN | 041000 / 41000 |
| Size | 32 oz |
| Form | Liquid (viable bacteria suspension) |
| Active Components | Two classes: nitrifying (chemolithotrophic) + heterotrophic facultative bacteria |
| Standard Dose | 1 oz per 2,500 gallons — weekly |
| Coverage (32 oz) | 80,000 gallons at standard dose |
| Spring Prep | Per dosing chart — 3 consecutive daily doses, then revert to weekly |
| Problem Ponds | 2–3× per week until resolved, then revert to weekly |
| Min Temp (best results) | 50°F+ (bacteria remain active but slow below 50°F) |
| UV Clarifier | Turn off for 24–48 hours after treatment |
| Chemical Algaecides | Avoid simultaneously — reduces bacterial effectiveness |
| Application | Dilute with 2–3 gal pond water; pour along pond perimeter |
| Storage | 40–80°F; do not freeze; do not store above 100°F; viable 1 year after purchase |
| Made In | USA |
UltraClear Biological Pond Clarifier Size Family
| Size | MPN | Coverage | Best For |
|---|---|---|---|
| 12 oz | — | ~30,000 gal | Small ponds; trial |
| 32 oz ← This | 41000 | 80,000 gal | Medium-large ponds; standard maintenance; best value |
| 1 Gallon | 41150 | ~320,000 gal | Large ponds; commercial; seasonal program |
Frequently Asked Questions
How long does it take to show results?
Most pond owners notice initial improvement within 48–72 hours. However, because UltraClear uses live beneficial bacteria that need time to establish colonies and process the nitrogen cycle, full results take 7–14 days of consistent weekly treatment. A heavily clouded or nutrient-loaded pond may take 2–4 weeks of consistent dosing to reach crystal-clear status.
For the fastest results: use the Problem Pond protocol (2–3× per week) and ensure the UV clarifier is off for 24–48 hours after each application so the bacteria can colonize filter surfaces without being killed by UV light.
Is UltraClear Biological Clarifier safe for koi, goldfish, and plants?
Yes — 100%. UltraClear Biological Clarifier contains only natural, non-pathogenic soil bacteria. It contains no harsh chemicals, copper, or biocides. Safe for koi, all pond fish, aquatic plants (the improved water quality actually promotes healthier aquatic plant growth), frogs, birds, dogs, cats, and other wildlife. Will not harm turf if treated pond water is used for irrigation.
Can I use UltraClear in cold water during winter or spring startup?
Bacteria remain active at temperatures below 50°F but slow significantly — metabolic rate decreases as water cools. For best results, dose weekly when water is above 50°F. Spring startup is an ideal time to use UltraClear: apply the Spring Prep protocol (3 consecutive daily doses per the dosing chart) at the beginning of the season to rapidly establish bacteria in your biological filter before fish become fully active and ammonia production increases.
How much UltraClear do I need for my pond?
The standard dose is 1 oz per 2,500 gallons weekly. The 32 oz bottle treats 80,000 gallons total. For a 2,500-gallon koi pond at weekly dosing, one bottle provides 32 weeks of treatment — most of a full active season.
To calculate pond volume: length (ft) × width (ft) × depth (ft) × 7.5 = gallons. For the initial Spring Prep dose, follow the dosing chart on the label for 3 consecutive days, then reduce to the weekly maintenance dose.
Does this treatment help remove muck from the pond bottom?
Partially. UltraClear Biological Clarifier's heterotrophic bacteria work in both aerobic and anaerobic zones and digest some organic sediment. However, for ponds with significant bottom sludge accumulation (leaves, heavy fish waste deposits), UltraClear recommends using Sludge Digester (SKU 47125) alongside the Biological Clarifier. The Sludge Digester is specifically formulated at higher concentrations for bottom sludge, while the Biological Clarifier focuses on the water column nitrogen cycle and dissolved nutrients.
Will UltraClear work if I have a UV clarifier or mechanical filter running?
Mechanical filtration — yes, keep it running. UV clarifier — turn it off for 24–48 hours after each UltraClear treatment. UV light kills bacteria, including the beneficial bacteria in UltraClear, before they can colonize filter media and pond surfaces. After 24–48 hours, the bacteria have established colonies and can be protected from UV by the biofilm layer they form. Resume UV operation normally after the 48-hour window.
Also avoid using copper-based or peroxide-based chemical algaecides simultaneously — they reduce bacterial activity and counteract the biological treatment. If you need to use an algaecide, apply it, then wait until it clears before starting UltraClear treatment.
Why Buy from Pond Pro Direct?
- Authentic UltraClear products — American-made, 30+ years trusted
- Expert pond water quality 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
