AQUACLEAR CycleGuard Power Filter, Size 20 -

AquaClear CycleGuard Power Filter

By AquaClear
Rated 4.3802 out of 5 stars
Size: Size 20
Size: Size 20

New Customers Only: Spend $49+ Get $20 off + Free Shipping with code: WELCOME

See Details for instructions to redeem
$32.99Chewy Price
$38.99Chewy Price

In Stock
FREE 1-3 day shipping over $49

About This Item


  • Preserves beneficial bacteria for a stress-free environment
  • Patented refiltration system for a healthy aquarium and clear water
  • Gentle waterfall design creates oxygenation
  • Comes with AquaClear Foam, Activated Carbon and BioMax filter inserts
  • Multi-stage filtration system helps maintain a healthy tank

See More


Play Video: Learn More About AquaClear From Our Team of Experts
Learn More About AquaClear From Our Team of Experts

Questions & Answers

29 Customer Questions

I want to make sure this will fit my tank. So what is the space between the intake and the back? I am basically wondering how big the lip on the tank can be?
Answer by ChewyJul 21, 2019
The dimensions are arranged as depth (front to back) x width across x height from the bottom of filter (not including the length of the tube). The 20-gallon filter is 4.5 inches long, 7 inches wide and 6.5 inches tall. Size 30 dimensions are 4.5 x 8.2 x 6.7 inches. Size 50 dimensions are 4 x 9 x 8 inches. Size 70 dimensions are 6.2 x 10.7 x 8.6 inches. Size 110 dimensions are 7.1 x 13.9 x 9.1 inches. The part of the filter that overhangs, into the tank, is approximately 2 inches.

How long does the filter tube extend out to
Answer by ChewyFeb 06, 2018
The tube extends to 6.5 inches for the size 110 filter.

Is this filter good for betta fish?
Answer by ChewyDec 19, 2017
This product is suitable for Betta fish. The patented refiltration system allows you to control the flow rate without compromising filtration efficiency for more delicate fish and plants.

Would this be a great filter for my messy turtle
Answer by ChewySep 03, 2018
The multi-stage filtration system helps maintain a healthy tank for both fresh and saltwater aquariums.

ReviewsWrite a Review

Rated 4.3802 out of 5 stars
121 Ratings
Would recommend to a friend

121 Customer Reviews

Rated 5 out of 5 stars
By Loach on May 26, 2023

Understand and Know Your Enemy

Anyone who keeps fish probably knows HOB filters are a common enemy. I have gone through many brands and am quite pleased with the Aqua Clear. It was dead silent the first 3 days, but now has a quiet steady hum. It took a little effort to get it primed, but it has a lot of flow options. Overall I am very pleased and haven't had any issues with excessive noise or sputtering (yet). I am currently reviewing this around the two month mark.

Rated 4 out of 5 stars
By Rose on May 6, 2023

Replaced under gravel filter, works fine.

Used with under gravel filter at first. It was not needed, so just using the Power Filter now and it works well. A bit louder at first, but raised the water level a bit, and now less splashing. I have two very large goldfish, 13 years old.

Rated 4 out of 5 stars
By apeflames on Apr 3, 2023

Not the best

I've been running Emperor 400's in my two 55 gallon tanks for over 30 years. Finally had to replace one last year. I bought two AC 70's to put on the dead side of my tank for extra filtration and water movement. They are good filters but I don't get all the hype about them. The Emperor is a lot better, in my book, hands down.

Rated 5 out of 5 stars
By Puckhog on Jul 31, 2022

The Best HOB

I have this HOB filter on most of my tanks. They outlast other brands. They are quiet. I like that you can change out media. The shape of the media basket is square so cutting filter pads to fit is easy. It would be nice if it had a surface skimmer like other popular models but the trade off is less junk in the tank and a cleaner look. Which I prefer.

Rated 4 out of 5 stars
By Fishtank on Jul 15, 2022

Great filter

I bought this to replace an incredibly noisy Tetra (which Chewy promptly credited). It was easy to set up, works very well, and is quiet. So far,I am happy with the filter. The filter media seems to be more economical than the very expensive Aqueon units I use on my other tanks.

Rated 5 out of 5 stars
By Gloria on Jul 15, 2022

Great little filter for small tanks

I have several aquaclear power filters. I bought this little one for a 5 gallon tank. It's just the right size. I buy these power filters because they use sponges as a filter media. Sponges are great for supporting a healthy bacteria bed.

Rated 5 out of 5 stars
By FishFan on May 29, 2022

Exceeds Expectation

I bought this one, because my old one by marineland stopped working. I am very happy by the results. The tank stays cleaner longer and it's easier to clean. It works better than I thought it would. I'm glad I bought it.

Rated 3 out of 5 stars
By Karl on Feb 7, 2022

Gets the job done!

I bought this because I was sick of using the canister filter and I had downgraded from a 55gal to a 36gal and this provided more than enough gph for that size of tank. It was great for the first 2wks then I came home to it sounding like a box of rocks. Chewy resolved that issue quickly with no worries. I received the replacement and this one was noisy. After some online research and a little Vaseline on the magnet the noise was reduced. With the lid off its almost whisper quiet. With it on there will be some humming. Apparently, it's just the brand and if that's something you can't live with don't purchase it. The sound of the water coming through will mask it after the Vaseline is applied. The other notable issue is the suction control. It is just the bottom of the intake pipe sliding across the hole. The issue is it sticks sometimes or catches as you adjust. If they were to create some kind of rubber gasket or boot that would help it slide better than plastic on plastic this would greatly improve the suction as well as the movement. Pros: Easy to maintain Affordable Media Easy Setup and Maintenance Accepts Various Media Good GPH for all sizes of tanks Cons: Noisy (until Vaseline applied) The suction selection could be better developed. Overall, I gave this 3 stars because the design can be improved to alleviate a lot of the issues. But it is a functioning power head/filter that does work. It has the water clean and crystal clear in about an hour after setup. It is a good power head/filter but could be better!

Rated 1 out of 5 stars
By Abra on Mar 15, 2022

impeller making loud sound.

Hello. I’ve had 2 aqua-clear filters in the past and never had an issue like this. The impeller is making a very loud sound and I have to turn it off when I sleep. Is there any way I can be sent a replacement impeller?

Rated 5 out of 5 stars
By Housco on Apr 25, 2022

Quiet filter that works

.First time owning an aqua clear product and I am impressed. Super quiet and well designed product.