How do i get a 20mm replacement nozzle for this pump ?

I have been trying to reach this seller for quite some time now without any success. I have used the email address on the box as well as tried messaging them here.... no luck

How do i set this product to be on a steady flow. The manual isn't clear.

If you press the mode button it switches between 3 digit numbers starting with a 1 or a 2. anything starting with 1 is steady flow. If you decide to use wave mode though the number preceded by 1 also affects wave mode. The number preceded by 1 appears to affect duration of the pulse where as the number preceded by 2 affects the time between pulses if the fist number is set to high the pump runs continuously regardless because the cycle doesn't end before the second begins. So long story short if I set the first setting to 101-104 then set the second number to 209-210 my tank really rocks and roles. Timing and duration are key to getting a wave going.

Can I use this pump externally?

Yes and No. Mine leaked external. I had to silicone it by unscrewing it and sealing it completely with silicone. Now it doesn't leak and is external. Caveat Emptor. But, so far a great pump.

yes, i have 2 of the 18000 models and they are both submerged ...

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Orlushy DC-4000 Silent Swirl Controllable DC aquarium Pump 25W 1050GPH-marine wavemaker return pump with sine wave Controller for salt/Freshwater coral reef fish tank sump Circulation

Orlushy DC-4000 Silent Swirl Controllable DC aquarium Pump 25W 1050GPH-marine wavemaker return pump with sine wave Controller for salt/Freshwater coral reef fish tank sump Circulation

Product ID: 68543846

Details

Brand
Orlushy
Color
Black
Horsepower
25 watts
Material
Copper
Maximum Flow Rate
17.6 gpm
Maximum Lifting Height
11.5 feet

⚡Energy-saving 25W DC motor

🔇Ultra-quiet sine wave tech

🎛️20 speeds & 3 modes control

R3335

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Silence, Power & Precision — Elevate Your Aquarium Game

POWER MEETS SAFETY - Low-voltage 24V DC with pure copper brushless motor ensures durability and peace of mind.
TAILORED FLOW CONTROL - 20 adjustable speeds and 3 modes (Constant, Wave, Feed) for perfect tank dynamics.
WHISPER QUIET OPERATION - Sine wave frequency conversion + ceramic shaft = near-silent aquatic harmony.
CONFIDENCE IN EVERY DROP - 180-day warranty with free replacements and responsive after-sale support.
VERSATILE NOZZLE OPTIONS - Three nozzle sizes for seamless fit across aquariums, ponds, and hydroponics.

The Orlushy DC-4000 is a 25W, 1050GPH submersible aquarium pump featuring ultra-quiet sine wave technology, a durable copper brushless motor, and low-voltage 24V operation for safety. It offers 20 speed settings and 3 operational modes via an external controller, plus three nozzle sizes for versatile aquatic applications. Backed by a 180-day warranty, it’s designed for both saltwater and freshwater environments, making it a top-tier choice for professional and hobbyist aquarists alike.

Specifications

Asin	B07C52Q4R1
Best Sellers Rank	#22,460 in Pet Supplies (See Top 100 in Pet Supplies) #44 in Aquarium Water Pumps
Brand Name	Orlushy
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (479) 4.3 out of 5 stars
Flow Rate	17.6 gpm
Horsepower	25 watts
Item Dimensions L X W X H	2.64"L x 1.3"W x 1.58"H
Manufacturer	aquariumstation
Manufacturer Part Number	43237-2
Material Type	Copper
Maximum Lifting Height	11.5 feet
Model Number	43237-2
Number Of Items	1
Power Source	dc
Product Style	Submersible
Unit Count	4 Count
Upc	634759664451
Voltage	24 volts

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