Great Aquariums Start Here
Live Chat Support
    Free Shipping
  • FREE Shipping ON $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
99% of items we carry qualify for FREE SHIPPING in the contiguous United States if you spend $75 or more. Learn More
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. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 2 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Filters  » Wet/Dry Filters  » Wet/Dry Filter Units  »  CPR CR900 Wet/Dry Filter (Wet/Dry Only)
CPR CR900 Wet/Dry Filter (Wet/Dry Only)

CPR CR900 Wet/Dry Filter (Wet/Dry Only)

Average Rating 4.5 11
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: CPR CR900 Wet/Dry Filter
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 1 left—order now!
In Stock: Order by 2PM EST for same-day shipping (M-F)
This item is in stock in our West Coast warehouse
Item #:
MSRP: $224.95
You Save: $51.76 (23%)
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:
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

CPR CR900 Wet/Dry Filter (Wet/Dry Only) Information

Product Manuals & Documentation

The value of a biological filter depends on how well it performs the tasks of oxygenation, ammonia conversion and gas exchange on a long term basis. In the wet/dry filter, air and water mix as water trickles over an exposed filter media such as Bio BaleTM. Biological filtration and gas exchange occur as the water flows in a thin layer over the media surface. (CR Series filters provide optimum growing conditions for bacteria which oxidize nitrite and toxic ammonia.) The rapid oxidation of ammonia and nitrite helps to maintain a stress free environment for aquatic life.

CPR filters are designed for long term reliability and ease of maintenance. These filters incorporate superior design features, such as:
  • Simple installation and operation.
  • Compact size to easily fit under your aquarium stand.
  • Excellent craftsmanship, all edges flame polished.
  • Efficient drip plate or drip lid dispersal.
  • Specially designed vented lids allow for proper gas exchange, and do not warp.
  • Recommended Tank Size: Up to 125 Gallons
  • Media Capacity: 4 Gallons
  • Dimensions (L x W x H): 21" x 10" x 15.5"
  • Inlet / Outlet (Bulkhead): 1" / None
  • Internal Sump (L x W): 9.25" x 8.75"

Manufacturer Info

CPR Aquatic Aquarium Supplies
In Arcata, located in Northern California, the sea is a way of life. From the advanced Marine Biology department at Humboldt State University, just up the hill from CPR’s headquarters, to Humboldt Bay, about a mile west, CPR is nestled in a perfect environment to develop equipment for marine aquariums. CPR was started in a small garage in 1987 to produce biological filters for local aquarists. People who used CPR filters were impressed by the high quality and affordable prices. Word spread and the company grew. Since then, CPR has expanded to a 10,000 sq. ft. production facility and has developed many innovative products over the years. CPR is incorporating new ideas and technologies all the time. Their goal is to allow aquarists to place the highest performing products in their tanks at reasonable prices.

CPR CR900 Wet/Dry Filter (Wet/Dry Only) Reviews

Average Rating
(11 reviews)
Sort Reviews By:
of 2

Super Product

Reviewers Rating Excellent!

Posted: 1/23/2015 from Bedford, TX UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This product is out of the park! Clearest water I have ever seen, clearer that your local pet store. Highly recommend this package.

Did you find this review helpful? Yes No

CR 900

Reviewers Rating Excellent!

Posted: 9/5/2013 from RIVERSIDE, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Very happy with Marine Depot and all the products that they sell. My new CR900 was simple to install and cleaned my water in minutes. It is easy for me to buy from Marine Depot rather than the Reef an fish store. Just call and it is at your door the next day at a good price.Thanks Marine Depot and all your reps.

Did you find this review helpful? Yes No

Okay Buy

Reviewers Rating Average

Posted: 4/18/2010 from PA, UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: I purchased the whole package with the overflow kit and return kit, overall they get the job done. I believe it's rated for 125 US gallons, my tank is 115. The filter does keep the water crystal clear, but comes at a price. A large amount of evaporation is allowed by the design of such products; I usually have to add about 2-4 gallons daily depending on the humidity. The return kit came with an underpowered pump that I was rather unsatisfied with. It may be rated for 600 gal/hour in standing water, but as soon as you attach the 5 ft. return hose the flow rate drops to about 200 gal/hour. The overflow kit now tends to draw more air bubbbles into itself, thus calling for more frequent purging; usually every or every-other day in my case. There is hardly any room for the return pump and a hang-on protein skimmer pump; there is no way you'd be able to have the skimmer itself in the sump tank. This area should be doubled in size to fit the pumps and/or skimmers for a 125 US gal. aquarium, that it is rated for. Perhaps even have a bulkhead on the far end. The filter pad and media included is actually decent, I might try switching to the bio-balls though. Despite the great design of the overflow box with its black shield to deter algea growth, the algea grows still and is a major pain to clean out. The hosing included with the box is quality, yet the connection didn't match up to the bulkhead atop the wet\dry chamber. I had to dismantle and reverse it so the hose would be snug, yet it still leaks slightly and has salt creep all over it. Some kind of adapter should be included to match the threaded bulkhead atop the chamber. So all-in-all it has pretty equal pros and cons, but I suggest getting one rated for a much larger tank than you have. Only problem with that is the price tags jump up a lot, which is why I got the SYS 900 that's rated just above my aquarium size.

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

Great Item

Reviewers Rating Excellent!

Posted: 4/15/2009 from PLACENTIA, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Great construction low noise!!!

Did you find this review helpful? Yes No


Reviewers Rating Excellent!

Posted: 11/1/2008 from CAMARILLO, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: ever since i started to use the CPR 900, my 40 gal reef aquarium has been shimmering!!! i have never seen it this clear before.. and it has only been a couple of days! it was an easy install because i purchased the deluxe package which had everything that i needed. the only piece that was missing was an aqua lifter pump and lid for the continuous siphon overflow. i would also recommend creating a lid for the CPR 900 due to evaporation. i also installed the coralife super skimmer for up to 125 gal as a hang on in the sump, and this is probably the best idea i've had for a long time. and if i ever upgrade to the next step (100 gal aquarium), i won't have to upgrade my filter systems. over all, this was a great addition to my aquarium!!

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

Cool Wet/Dry

Reviewers Rating Great

Posted: 2/21/2008 from AVON PARK, FL UNITED STATES
4.0 5
Experience Level: Beginner

Comments: Great system but the hose that came with it is a bit stiff. Because of the confined space it created somewhat of a sink trap eventually flow got backed up. I had to change to pvc with a vent pipe to give it a better run.

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

Great Product

Reviewers Rating Excellent!

Posted: 9/19/2007 from YUKON, OK UNITED STATES
5.0 5
Experience Level: Expert

Comments: This is a good wet/dry for small tanks with low bioload.

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

Picture slightly misleading

Reviewers Rating Great

4.0 5

Comments: This is my first wet and dry as I am replacing my HOB's for maintenance cost reasons. No area for sponge filter or carbon bag.

1 of 5 People found this review helpful, did you? Yes No

nice filter needs biggersump

Reviewers Rating Great

4.0 5

Comments: this is a nice filter i think that it should have a bulkhead on the sump that way you have more space for skimmers and other stuff. otherwise it is a nice quite filter

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

Not good

Reviewers Rating Below Average

2.0 5

Comments: this filter has no sump space for any thing i dont recommend it

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

of 2

Accessories for CPR CR900 Wet/Dry Filter (Wet/Dry Only)

Please make a selection 
WIN A MEDIA REACTOR! Sign up for hot deals, helpful videos, and a chance to win an Accel Aquatics FR-30 Media Reactor!