Great Aquariums Start Here
Live Chat Support
    Free Shipping On $75+
  • FREE Shipping On $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on
Orders Over $75
Standard ground shipping (1-7 business days) starts at a low $4.99 and most orders over $75 ship FREE. Learn More
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » UV Sterilizers  » UV Sterilizers  » 15 to 18 Watt  »  Coralife Turbo Twist 6X UV Sterilizer - 18 Watt
Coralife Turbo Twist 6X UV Sterilizer - 18 Watt

Coralife Turbo Twist 6X UV Sterilizer - 18 Watt

Average Rating 4 21
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: Coralife Turbo Twist UV Sterilizer
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
LOW STOCK ALERT: Only 3 left—order now!
In Stock: Buy now and your order will ship the next business day
Item #:
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

+ Add to Wishlist
Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
Qualifies for Free Shipping!
FREE Shipping Promo offers FREE standard ground shipping via UPS on orders of $75 or more for orders containing non-overweight or oversize items (orders which do not qualify for our FREE shipping promotion will still be shipped at a discounted rate).

Terms and Exclusions:
  • Offer valid only on orders shipping within the contiguous United States. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam or other US Territories do not qualify for this promotion.

  • This promotion does not apply to items requiring expedited shipping, such as refrigerated products, frozen products or live rock.

  •'s FREE shipping promotion does not include products sent in oversized or particularly heavy boxes. This may include but is not limited to aquariums, canopies, chillers, external water pumps, metal halide magnetic ballasts, stands and substrate/sand. These items may be subject to additional shipping handling charges. Should shipping surcharges apply, they will be noted on individual product pages and / or displayed during check-out. We will, however, pay a portion of the shipping charges for these orders.

  • Shipping surcharges, such as special handling are NOT covered under the FREE shipping promotion.

  • Shipping charges for returned merchandise is non-refundable. Please read's Return PolicyPolicy for more information.

  • Price matched (Low Price Guarantee) or discounted orders do NOT qualify for our free shipping promotion.
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.
Shipping Cost*
Competitor's Website*
*Required information
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

Coralife Turbo Twist 6X UV Sterilizer - 18 Watt Information

Product Manuals & Documentation

Coralife Turbo-Twist ultraviolet sterilizers feature a unique twist flow design that guides water flow more evenly through the sterilizer, increasing exposure to ultraviolet light and improving the treatment of unwanted algae and harmful microorganisms.

  • Easy set up and installation
  • Mounting brackets included for hang on or in-line applications
  • Can be used with freshwater and saltwater aquariums
  • 3x (9W) - up to 125 Gallons
  • 6x (18W) - up to 250 Gallons
  • 12x (36W) - up to 500 Gallons
  • 3x (9W) - 100-200 gph - 1/2" or 5/8"
  • 6x (18W) - 200-400 gph - 5/8" or 3/4"
  • 12x (36W) - 400-1200 gph - 3/4" or 1"

Manufacturer Info

Coralife Aquarium Supplies
Coralife is one of the market’s leading manufacturers of premium aquarium products. The brand is best known for their comprehensive line of aquarium lights, protein skimmers and calcium reactors. Coralife’s unique line of aquarium accessories—protective gloves for maintenance and coral propagation, accurate and affordable digital thermometers and hydrometers—set Coralife apart from other brands and have created quite a following among aquarium hobbyists. With an ever-expanding and diverse product line coupled with customer support that is second-to-none, Coralife sets the bar high for aquarium supply manufacturers and they will no doubt continue to wow aquarists with their innovative, low-cost solutions for years to come.

Coralife Turbo Twist 6X UV Sterilizer - 18 Watt Reviews

Average Rating
(21 reviews)
Sort Reviews By:
of 3

Turbo Twist

Reviewers Rating Excellent!

Posted: 9/27/2015 from PALMDALE, CA UNITED STATES
5.0 5
Experience Level: Expert

Comments: This item is replacing the older model which began to leak. So far, so good. Working excellently.

Did you find this review helpful? Yes No


Reviewers Rating Unsatisfactory

Posted: 1/30/2015 from SAN ANTONIO, TX UNITED STATES
1.0 5
Experience Level: Expert

Comments: In 2 1/2 years I have been through two of these (36W), and both have had seals fail ruining the units -the second failing after only 6 months of use. Don't waste your time or money. Find another unit!

1 of 3 People found this review helpful, did you? Yes No

Great compact unit

Reviewers Rating Excellent!

Posted: 1/22/2015 from Saint Louis, MO UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: I liked this unit because it was a little smaller than comparable power rated ones. I had a little difficulty with threaded connector for the hose adapter. Just used a regular hose clamp, no problems.

1 of 1 People found this review helpful, did you? Yes No

UV sterilizer

Reviewers Rating Excellent!

Posted: 11/18/2014 from WESTMINSTER, CA UNITED STATES
5.0 5
Experience Level: Expert

Comments: This unit is beyond my expectations. Very well built and extremely durable. Would highly recommend this product.

Did you find this review helpful? Yes No

Keep Looking

Reviewers Rating Below Average

Posted: 5/9/2014 from RIO RICO, AZ UNITED STATES
1.5 5
Experience Level: Intermediate

Comments: I have gone through two of these within the last year. The "stainless" steel tends to rust through which technical support claims is as harmless as using GFO in your system. I don't know about you but I don't like my equipment rusting and flowing into my tank. Supposedly China is working on taking out the metal sleeve and redesigning it. I'll give it another look when they do. The plastic mounting clips on my last two also broke over time.

4 of 7 People found this review helpful, did you? Yes No

good design, skimped on parts

Reviewers Rating Great

Posted: 3/22/2014 from MN
4.0 5
Experience Level: Expert

Comments: The internal twist design doesn't increase dwell time; that would be impossible. But it does discourage laminar flow in the unit, so the chances of any pathogens spending some time close enough to the lamp for sterilization are greatly increased. I like the unit. The ballast is suspect (at least from the units of a few years ago). Mine recently failed, so I re-wired with a Workhorse 3, and the intensity of the UV light coming from the indicator window is now MUCH brighter. If you have any DIY skills, I would advise switching to a Workhorse ballast (after the warranty expires).

1 of 1 People found this review helpful, did you? Yes No

99 percent

Reviewers Rating Excellent!

Posted: 2/26/2014 from COTTAGE GROVE, MN UNITED STATE
4.5 5
Experience Level: Intermediate

Comments: This product is almost perfect out of the box. I did quite a bit of research on UV sterilizers and choose this one based on its ability to maintain contact with the water for just that much longer as it followed the twist around the UV bulb. I would say that an extra 1/16th of an inch of plastic in the mounts would make this sterilizer absolutely perfect. When trying to snap the mounts onto the body of the sterilizer you actually have to fight with them, almost to the point of breakage to get them to fit. When assembling the bulb be sure to avoid touching with your fingers as the oils on your fingers will shorten the bulb life. All the seals and connections were tight and waterproof directly out of the box. However, I did not use the plastic nuts supplied to connect the tubing as they really didn't fit well or seem like they would do the job intended. I therefored used automotive hose clamps which maintained a watertight seal the first time. When looking for a pump to run the unit I choose the Eheim 1000 Compact Pump.

1 of 1 People found this review helpful, did you? Yes No

Burnt out bulb - short

Reviewers Rating Below Average

Posted: 1/15/2014 from MORGANTOWN, WV UNITED STATES
2.0 5
Experience Level: Expert

Comments: This was my second TurboTwist. I had the smaller unit on a nano and then upgraded to the 12X on a larger display tank. The smaller functioned fine with no problems. The 12X lasted 4 months. After a cleaning I noticed stray voltage in my display tank and found that there was water in the bulb housing, I thought somehow water had gotten in after a cleaning. This time everything was dry and sealed and it worked for another few weeks then I noticed the indicator lamp was not glowing and the bulb housing was hot. I disconnected and found water again and that the bulb had short circuited itself. The bulb housing was burnt with severe corrosion. I am lucky it did not start a fire and that I had grounding probes in the tank else the livestock might have been killed.

6 of 6 People found this review helpful, did you? Yes No

Coarlife Turbo Twist 3X

Reviewers Rating Great

Posted: 1/8/2014 from FREDONIA, WI UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: This is the first UV unit I ever bought, and the reason was because I was starting to get alge. I wish I would of had this before an ick breakout that killed 5 fish...arghh. The reviews on it are spot on. Nice HD construction. I have it hooked inline from my canister, and the comment about the 1/2-5/8 connection is also spot on. I didn't use those connectors, instead bought some hose clamps to insure no leaking. I would recommend doing this if you have leaks.

Did you find this review helpful? Yes No

Why 5 stars?

Reviewers Rating Excellent!

Posted: 12/20/2013 from Miami, FL UNITED STATES
5.0 5
Experience Level: Expert

Comments: I have given this product five stars, not only because of its performance and easy installation, but rather because of the superior customer service I've received. Once fully installed, I noticed that the lamp wasn't working. A brief call and they offered several solutions to replace the unit. I called the manufacture who within five minutes offered to ship me a new ballast at no charge. Although I shop at my LFS for water and marine life, I chose this store for all my hardware, for exactly the reasons I experienced this week. Thank you.

1 of 1 People found this review helpful, did you? Yes No

of 3

Accessories for Coralife Turbo Twist 6X UV Sterilizer - 18 Watt

Please make a selection 
WIN A $499 ANGEL LED! Sign up for our best deals, how-to videos and a chance to win a Euroquatics A1P Angel LED!