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Canister filters are considered the best method of water filtration in Aquascapes. They're out of sight, quiet, and efficient. Let's find out if the SunSun HW 302 is worthy of being used in an Aquascape.

Our SunSun Canister Filter Review

Oct 10, 2017  SunSun 304b Review? October 10, 2017 by mod. Does anyone have a review to share with me on the 304b or maybe the 404b series?.Awarded Answer Posted by Alisha H: The SunSun line of canister filters are super popular because of how cheap they are. Some people claim they are “cheap” and not worth it but I disagree. May 02, 2016  (What I mean by this is SunSun 303B & Aquatop CF400UV are the same units! This hold true for 304B to CF500UV) Ignore my horrible grammar. Worked a 12 hour shift, came home to clean fish tanks and then to hurry up and type this review! The Canister Filter I'm doing the review on is the SunSun HW-303B Canister Filter.

This filter's gotten a ton of coverage, plus overall great reviews online, so we decided to take a deeper look into whether the SunSun HW302 actually holds up to the ratings it's getting online. Let's take a look:

  1. Apr 17, 2016  So, I got a SunSun 303B to replace my broken Fluval 204. It was about $88 shipped to my door. You will definitely see that it is a knockoff by the poorly translated words and phrases. It starts with it being titled on the box as an Outside Filter as opposed to an External Filter. So, here's the box Here's everything out of the box.
  2. Aug 27, 2016  SunSun HW-303 Aquarium External Canister. Aquarium canister filter (Model HW. Packet Inlet & outlet tube with protection basket operation manual. OUT SIDE FILTER MODEL HW-304B VOLTAGE 110V. SUNSUN HW-304B Canister Filter has a convenient Prime Pump that eliminates the need for manual. Download Sunsun filter model hw-303 manual >>.
  3. Sep 12, 2014  SunSun specializes in aquarium and aquatic equipment as well as gardening equipment and hotel supplies. While the name SunSun does not have the same recognition as EHEIM or Fluval in the United States, SunSun has been growing since the 1980s in China and currently offers over 120 different products in over 500 specifications.

It's surprisingly well-built

Sunsun filter manuals

For starters, this filter is nearly silent. That can't be understated. For those with some cheaper filters, you know how valuable this is. The only way to tell the HW 302 canister filter is on is to touch it. It's that quiet. If you're placing your canister filter in an aquarium cabinet, you'll likely forget it's even running.

Apart from the spray bar and intake included, the overall filter is made of a rugged plastic that seems to take stress well enough. The seals and tubing included are of great quality, and seem to hold up over time. We've had ours for nearly one year, and haven't had any sort of leaking issue. I'd be comfortable comparing its build quality to any Marineland or JBJ filter in its price range.

The latching system to attach the head to the casing is nearly fool-proof. You could probably do it a minute or so without the instructions, which is good—because the downside to this canister filter is that the instructions suck. Really bad.

Does it filter as well as more expensive options?

Surprisingly—yes. I have to admit, I wasn't sure whether it'd compare to the Marineland Or JBJ filters, but after we used them for a few months with the water staying crystal-clear the entire time, I was sold. Use the money saved to the replace the intake tube and spray bar, and you'll have a system that's just as good as those with much higher price points.

Filter Flow

It's got great flow if you take care to consider the amount of media you're placing inside. (Don't stuff it full, and you're fine—just like any other canister filter.) After placing the intake/outake in the same locations as some other test filters we've used, we didn't have any dead spots, and it didn't require any special considerations.

Maintenance

There's not much that varies from most other canister filters in this regard. This SunSun canister filter includes media baskets for customization of filter media, and they're relatively easy to work with. (The filter baskets on the SunSun might be a little stiff, but nothing too challenging.)

Overall, we're quite happy with the SunSun filter after maintaining it for nearly a year. (We did make some filter material changes, including adding carbon and filter floss; however that's because of our desire for crystal-clear water.)

Hose Connections

The hoses included with the SunSun canister filter were well-made, and connected securely to the filter with a satisfying 'click' of the valves. The shut-off valve for the filter actually worked, and prevented even the slightest leaking around the connections while it was being serviced.

A great benefit to the quick-release shutoff is that one switch closes both the intake and outake hoses. This isn't necessarily true of some other canister filters, and for that we're very happy with how they've structured the HW 302.

Priming the HW 302

Many filters work great, but are stubborn to prime. This SunSun filter was relatively easy to get going, and didn't have any flow issues once we got it started. (Plus, it's a big blue button; who doesn't want to press a button like that?) The button-priming is a feature that's often seen on mid-range to high-end filters, but it's nice that a reasonably price filter has this functionality, as well.

The Surface Skimmer...

One puzzling aspect of this filter is the included surface skimmer. It was way too short to reach the water surface. If you're using a rimless tank (which you likely are, since you're reading about Aquascapes!) you might get it working, but traditional tanks will likely have no use of the HW 302 skimmer, especially in the realm of aquascaping; protein build-up usually isn't an issue. Not the biggest deal in the world, but we thought we'd mention it. (You can also consider buying a protein skimmer separately, we have reviewed the top 10 here).

Installing the Filter

Surprisingly, it's not a challenge to put the SunSun HW 302 filter together. Even though the instructions we quite a hilarious case of 'Engrish', there wasn't anything in the filter that would give even a basic aquarist any issues. As long as you've got some patience to assemble the filter without the instructions, you shouldn't have too much trouble.

We have also covered some HOB filters here, that you might like.

Sunsun 404b Parts

The Instructions...

Let's talk about this for a moment... These instructions are horrible. There's not much to worry about if you've ever seen a filter before, but the principle of the matter is this: when you start trying to build a Sunsun canister filter, you won't be able to makes heads or tails of the instructions. Most of us know the basic functions of a filter, and we didn't have too many issues putting everything together, but it would be worth it for SunSun to get their act together about is.

Luckily, the filter is pretty self explanatory, so if you're worried about whether or not to pick another filter or not, I'll say this:

The price difference in this filter and any comparable competitor is well-worth the hilarity in the instructions.

Pricing

Considering other canister filters in this category, the SunSun HW 302 is a steal. If you're worried about quality—stop worrying. We were as well, but after using it for nearly a year, we'd definitely buy it again should the need ever arise.

Sunsun Filter Manuals

You can get one over on Amazon:

The SunSun Brand

The company is based out of China, and was founded in 1985. While most products that come from China might be thought of as cheap or easily breakable, the SunSun 302 canister filter defies that expectation. From what we've encountered in our office, their products are well-built for their price, and simply do what they're supposed to.

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