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SCWD Wavemaker - Switching Current Water Director (Squid)
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SCWD Wavemaker - Switching Current Water Director (Squid)

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In stock: Order by 2PM EDT for same-day shipping (M-F only)

Item #: 3Q1111P

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Quick Overview

The SCWD (pronounced |||||squid|||||) is a revolutionary device designed to provide alternating currents without the use of electricty. The SCWD mounts inline with 3/4||||| tubing, the two ports alternate the output, the bottom port is the in...
Product Description

SCWD Wavemaker - Switching Current Water Director (Squid) Information

Part #: SCWD-3/4

The SCWD (pronounced |||||squid|||||) is a revolutionary device designed to provide alternating currents without the use of electricty. The SCWD mounts inline with 3/4||||| tubing, the two ports alternate the output, the bottom port is the input. A great alternative to expensive electronic ball valves. The SCWD will run on any pump with a minimum output of 50 GPH and a maximum output of 1400. The switching speed and current duration is dependent on the volume of water flowing through the SCWD. You can control the duration by controlling the flow going through the SCWD. Can be submersed for use with large power heads or used externally.

SCWD is regarded by industry experts as the most energy efficient wave-making product on the market. It replicates nature by generating alternating currents within a tank or pond. These currents stimulate coral, fish, and plant growth and keep other aquatic life healthy because of the tank or pond? increased water currents and oxygenation.

A great product with a full 90-day manufacturer`s warranty.

Flow into SCWDSCWD TD OutputEfficiencySwitching Duration
150 gph90 gph60%22 seconds
180 gph120 gph65%16 seconds
240 gph180 gph75%12 seconds
270 gph210 gph80%10 seconds
330 gph240 gph80%9 seconds
400 gph360 gph90%7 seconds
600 gph540 gph90%5 seconds
720 gph660 gph90%4 seconds


Converting psi to feet:
Fresh Water
Multiply the psi by 2.31 to derive feet. example: 5 psi X 2.31 = 11.55 ft

Salt Water
Multiply the psi by 2.25 to derive feet. example: ex: 5 psi X 2.25 = 11.25 ft



The SCWD (pronounced “squid”) is a revolutionary device, designed and manufactured to provide years of reliable service. Clearly the most efficient wave maker on the market, coupled with unique and patent pending free-flow, low back-pressure features, this compact product is the best mechanical current generating device available on the market today.


This unit has been tested and is approved for use with pump applications not to exceed 1400 GPH and a maximum of 5 psi, with a minimum rating of no less than 50 GPH. To get the maximum benefit and safest operation from this product please carefully read and follow all instructions and recommendations contained in this manual.  






 READ AND FOLLOW ALL SAFETY INSTRUCTIONS - Even though this is not an electrical device, care should always be taken during installation, maintenance, or removal.


WARNING — To guard against injury, basic safety precautions should always be observed, including the following.


DANGER — To avoid possible electric shock, special care should be taken in the use of aquarium equipment.


1. It is important to avoid the possibility of an electrical aquarium accessory or receptacle from getting wet. Position the aquarium stand and tank to one side of a wall mounted receptacle to prevent water from dripping onto the receptacle or accessory plugs. A “drip loop” (shown in Diagram 1) should be arranged by the user for each power cord connecting an aquarium appliance to a receptacle. The “drip loop” is that part of the cord below the level of the receptacle, or connector if an extension cord is used, to prevent water from traveling along the cord and coming in contact with the receptacle.


DANGER - If the plug or receptacle does get wet, DON’T unplug the cord. Disconnect the fuse or circuit breaker that supplies power to the appliance. Then unplug and examine for presence of water in the receptacle.


2. Always unplug any accessory when not in use, before installing or removing parts, and cleaning.


3. Do not use any aquarium accessory for other than the intended use.


4. Do not install or store the SCWD or other accessories where they will be exposed to weather or temperature extremes.



 SCWD WaveMaker


 Manufactured to the highest standards of quality and reliability, your new 3iQ Ventures LLC SCWD WaveMaker is designed to provide convenient, trouble-free operation. Careful attention to these instructions is the first step in ensuring that your wave maker will perform as intended.


Please Read All Instructions Completely Before Attempting to Install and Operate Your wave maker.



Special Note - Although there are many different ways to install your new SCWD, the following instructions reflect the preferred method of installation. In addition, even though your new SCWD is not overly sensitive to the normal particulate and debris found in aquarium systems, to ensure long life, water must be filtered prior to entering the SCWD.


a. Measure and cut two pieces of 3/4 inch (ID) hose for the two outlets. For best results, it is strongly recommended that both outlet hoses are cut equal in length, leaving the SCWD centered between the two outlets (ref. Diagram 1).


b. Measure and cut one piece of 3/4 inch (ID) hose that will be connected to the water pump, canister filter, or powerhead outlet at one end and the SCWD inlet on the other. It is recommended that an inline valve be installed between the water pump and the SCWD to allow for flow adjustment, and for ease of removal and cleaning of the outlet hoses if required.

c. Install one hose on each outlet of the SCWD by applying firm, but even pressure, until each hose is fully seated. It is recommended at this point that you install worm clamps for added protection against leaks and the possibility of the hose coming loose. Do not over-tighten the worm clamps.


d. Install the inlet hose using the same operations noted in 1.c., paying close attention not to exert too much force on the nipple.


e. Once all hoses are mounted and clamped, you are now ready to install the outlet elbows and nozzles on each end of the outlet hoses. By combining rigid elbows to form

What's in the Box

  • SCWD
  • Product Manual


Manufacturers Warranty: 90 Days

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SCWD Wavemaker - Switching Current Water Director (Squid) Reviews

Average Ratings:

GREAT PRODUCT! Product Review by Aaron Mullins (Posted on 2/26/14)

Comments: I've had mine going for a year in a berlin reef set-up (ie. no bio or mechanical filtration) and have never had to clean mine. Works as advertized. I've used powerhead/wavemaker B4 and this lots better!

Great Product! Product Review by Fish Guy (Posted on 2/26/14)

Comments: I've got mine running on a Mag 9.5 and it cycles every 6 seconds. My corals are opening up more. I eliminated 2 powerheads in the tank with the SCWD

I may be life testing mine Product Review by Steve (Posted on 2/26/14)

Comments: 2 years and still going. No problems whatsoever. Water should be clean going into the SCWD. I use a prefilter in my overflow and additional mechanical filteration in the sump.

It's somewhat unreliable Product Review by Zuri Barniv (Posted on 2/26/14)

Comments: I've had my 2 SCWD's for about 7 months. They have been really nice except for TWICE already I've had to take them apart and clean them out. They stopped working due to sediment deposits.

amazing wave maker Product Review by OMAR ALADSANI (Posted on 2/26/14)

Comments: i fix one scwd on my 100 galon reef tank with 2400 liters pump (600 galon) it make a very good wave realy amazing no electric no noise very simple small in size big in work.

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