- CW-50 External Algae Scrubber - Clear Water
Solve your nutrient & algae issues with an Algae Turf Scrubber from Clear Water Scrubbers. Algae scrubbers can save you money and time with the minimal maintenance and energy usage.
Dimensions - 12 1/4" L x 7" W x 7 1/2" H
- Easy to harvest
- Safe design
- Simple to plumb
- Quality acrylic construction
- Multi-directional input barb
Algae turf scrubbers use natural growing algae to combat nutrients and have been used for many years now with great results. Many reefers that have been using them do not use any type of protein skimmer or expensive phosphate removal media to combat nutrients because scrubbers work very efficiently and can be added to almost any saltwater or freshwater system. As algae grows it will "lock" up nutrients in its structure and harvesting the algae you are basically removing nutrients and other undesired chemicals from your tank
Clear Water Scrubbers are an external design that needs to be mounted higher than the sump of your tank for the drain to flow into. The feed for the scrubber can be done with a stand-alone feed pump, manifold, or through the drain of your aquarium and plumbed into the included 1/2" barb fitting. Water will then flow over the algae screen that is blasted with high power red/blue LED lights that encourage algae growth and then the water will flow into the main drain fitting and down into your sump. Clear Water's scrubber was designed with a 1/2" emergency drain fitting that will accept any excess flow if the 1/2" main drain ever gets clogged with algae.
Maintaining the scrubber only takes a few minutes every one to three weeks to harvest the algae that has grown on the screen. By removing the horizontal union and rinsing the screen under a faucet will help knock a majority of the algae off the screen to be disposed of. Removing all the algae from the screen will lead to a slow start of the next batch and by leaving a small amount of algae on the screen you will help seed the next batch allowing it to grow faster. You may need to use a soft bristle brush (toothbrushes work great) to clean the slot that the screen fits into every now and then also.
Max Recommended Tank Size - Up to 100 gallons
Dimensions - 12 1/4" L x 7" W x 7 1/2" H
Screen Dimensions - 5 1/2" x 6"
Recommended Flow Rate - 150 GPH
Input Barb Size - 1/2"
Main Drain Bulkhead - 1/2"
Emergency Drain Bulkhead - 1/2"
Power Consumption - 20W @ 120VAC
1x CW-50 External Algae Scrubber
Clear Water Scrubber Sizing Recommendations
Oversizing an algae scrubber does not necessarily mean that it will grow algae faster or be more efficient, and in some cases, we have found oversizing the scrubber too large, can lead to poor results.
|Model||Screen Size||Aquarium Size|
|CW-50||6" x 6"||60-100 gallons|
|CW-100||7" x 7"||120-200 gallons|
|CW-200||10" x 8"||180-400 gallons|
|CW-300||11.5" x 10.5"||400-1000 gallons|
1. Find a suitable place for the scrubber to be placed that allows it to freely drain into your aquariums sump.
2. For best results remove the main and emergency drain bulkheads and install them in reverse (flange and gasket inside of the scrubber body).
3. Using 1/2" soft tubing or PVC plumb the drain into your sump.
4. Plumb the emergency drain with 1/2" PVC or soft tubing allowing it to drain into your sump. We prefer to keep the emergency drain a few inches over the water level making the water crash into the sump that produces an audible noise, letting you know when something is not correct with the main drain.
5. Attach 1/2" soft tubing to the included feed barb fitting. We really like using soft silicone tubing for this application.
6. Adjust the flow over the algae screen so that an even sheet of water flows down the screen. Flow adjustments can be made with either a ball valve on the feed line or with a DC style pump.
7. Plug the LED light power cord into a timer or aquarium controller and program it for a 12-hour daily photoperiod. We suggest illuminating the algae scrubber in an opposite lighting cycle than your display tank to help stabilize your aquarium pH.
8. Monitor the algae growth and after a few weeks, algae will be ready to harvest!
Note - For feeding the scrubber we prefer to use a stand-alone feed pump since they can be fine-tuned to the algae scrubbers needs. We really like to use DC pumps that let us control the flow rate through a controller or an AC pump with a ball valve.
works awesome By jeremy on 4/30/2020jeremy would recommend this product to a friendthe bad reviews are from people not setting it up correctly (love to blame product and not themselves) I’ve had zero issues with this scrubber it works exactly as Clear water says it does. Simply do research on how to use correctly and you will love it. It really does a great job
Use it correctly and you will love it. By Robert on 10/6/2019Robert would recommend this product to a friendThose who say this doesn't work or are having issues are using it correctly. First off the outlet needs to be above the water line so that it doesn"gurgle". Second you need to seed the screen in order for it to grow something. Rub it on some hair algae that is already growing somewhere. I did both and have nothing but compliments for it. My nitrates have dropped in half in only 2 weeks and i have had to clean the screen once already.
Nice looking but poorly engineered By Oldtimereefer on 7/17/2019Oldtimereefer wouldn't recommend this product to a friendI'll keep it simple. Looks nice. Leaks like crazy and lights are not properly sized. Burns algae. Had to go online to forums to get fixes others are doing to make these run. Definitely don't recommend especially if you like your flooring around the tank.
Update By Customer on 7/17/2019Customer would recommend this product to a friend*Update*
I changed my review after the company sent me new pipes at no charge to fix the leaking issue I was having. The customer service for this company is top notch. I was able to fix the gurgling issue but I had to use a 3/4" pipe to make this happen. I believe this unit needs bigger outputs to fix this gurgling issue. Other than that it has worked well.
It's too good By Luke on 2/27/2019Luke would recommend this product to a friendUse these at your own risk- they are extremely efficient at pulling nitrate and phosphate out of the water. I ran this in conjunction with my protein skimmer and started having an Amphidinium Dinoflagellate outbreak, a common consequence of a low nutrient system. In an effort to raise, yes raise, nutrients from test-kit zero I removed my skimmer and started feeding more. Still no dice, I feel dirty dunking mysis shrimp into my system to keep nutrients up so I can promote competition against the dinoflagellates. This thing is insane lol
Loud, back siphon constantly By Steve on 2/16/2019Steve wouldn't recommend this product to a friendHave tried to get this scrubber to work for 6 months off and on. Its loud, gurgles all the time. I installed a two little fishes valve to adjust flow, regardless of how much or how little always back siphon. Dosent work for me. Wouldnt buy again
Don't hesitate.... buy one! By Frank on 4/22/2018Frank would recommend this product to a friendRemoved my skimmer and stopped vodka dosing two weeks after putting this on my Red Sea 350 reefer, stocked with 11 fish, SPS, LPS and softies. Well built and works wonders!!!
Unhappy By Kenneth on 2/19/2018Kenneth wouldn't recommend this product to a friendBefore i bought this algae scrubber I had a (DIY)one and it worked perfect,the only things it took up a lot of room in my sumps..so i saw this one and said i can save room in my sump...so i bought this on 12-19-17and its 2-19-18 and still no algae and now its growing all in my tank. i gave it 2 stars because it look good but not happy at all.