---
product_id: 18853984
title: "HW-704B"
brand: "sunsun"
price: "€ 667.29"
currency: EUR
in_stock: null
reviews_count: 8
category: "Sun Sun"
url: https://www.desertcart.gr/products/18853984-hw-704b
store_origin: GR
region: Greece
---

# 9W UV sterilizer power 525 GPH (2000 LPH) flow rate 4 large customizable media baskets HW-704B

**Brand:** sunsun
**Price:** € 667.29
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your aquarium game with pro-level clarity and care!

## Quick Answers

- **What is this?** HW-704B by sunsun
- **How much does it cost?** € 667.29 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/18853984-hw-704b)

## Best For

- sunsun enthusiasts

## Why This Product

- Trusted sunsun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Maintenance:** Drip-free shut-off & easy-access baskets make cleaning a breeze
- • **Massive Media Capacity:** Four large baskets let you tailor filtration with your choice of media
- • **Powerful UV Sterilization:** Built-in 9W UV light kills algae & bacteria for healthier aquatic life
- • **Quiet & Space-Smart Design:** External canister frees tank space and runs whisper-quiet
- • **Crystal Clear Water, Every Time:** 5-stage multi-layer filtration for pristine tank clarity

## Overview

The SunSun HW-704B is a robust external canister filter designed for aquariums up to 150 gallons. Featuring a 5-stage filtration system with four large media baskets and a built-in 9W UV sterilizer, it delivers 525 gallons per hour of crystal-clear, bacteria-free water. Its quiet operation, customizable media options, and easy maintenance make it a top choice for serious aquarium enthusiasts seeking healthier, vibrant aquatic environments.

## Description

The new 2016 SUN HW-704B external aquarium Filter system utilizes a multi-stage approach to filtration. Filtering aquarium tank water through four (4) internal layered baskets filled with assorted filter media material provides extremely thorough biological, mechanical and chemical filtration. This canister draws water into the filter through an inlet tube and returns crystal clear water via an outlet tube (both supplied). the outlet tube is fitted with a spray-bar to help increase oxygen aeration levels within your tank. These filters are absolutely ideal for freeing-up space within your tank and provide a huge internal capacity for filter media, making them suitable for larger volume tanks. The four flexible media trays allow you to add other filtration media such as SUN activated carbons, ceramic rings or bio-balls (sold separately). by filtering your tank using the filter media, you will observe a vastly improved level of waste-free water through extremely strong biological purification. The filter's easy-access layered filter media basket's make it simple to customize your media choices to suit your aquarium and fish livestock needs. The built in UV sterilizer exposes passing water to lethal doses of Ultraviolet light, killing, sterilizing or otherwise irreparably damaging many micro-organisms. Your fish tank water is pumped past the UV light which is sealed inside a quartz glass sleeve which is designed to allow the maximum amount of UV to pass through the water. Maintaining the filter is very simple. The drip-free shut-off tap allows you to remove the filter and transport It away from your aquarium fish tank to an area more suitable for cleaning. Each filter media basket lifts smoothly out of the unit and can be easily rinsed through and returned to continue its operation.

Review: Great Value - After reading some reviews on desertcart and watching a few YouTube videos on the SunSun HW-704(B), I decided to purchase one for my 30 gallon tank. The unit was shipped out quickly and arrived in good condition. It seems that SunSun must have also quality checked the canister for leakage since the filter sponge was slightly moist. I am pretty happy with it and bought another one for a new 50 gallon tank a few months later. Although I only use it once or twice a week, it's nice there is a UV sterilizer light to sanitize the water. Some people seem to have issues with the light damaging the plastic trays, but this seems to be a problem only if the light is turned on all the time. I didn't see this as a defect, but took it as something to keep in mind since the heat from any light placed next to plastic can cause it to degrade over time. There is also a small indicator light on the top of the canister to let me know that it is working. The build on this seems pretty good. The outside of the canister is sturdy and it fits between the legs of my 29 and 40 gallon metal Imagitarium tank stands from Petco. The green hose can be fitted onto the inlet and outlet by softening the hose - just dip each end into hot boiled water for a couple of seconds before slipping it over one of the canister's nozzles. Once it cools, the opening will contract to form a nice tight seal. I have not had any issues with leakage using this method. Note that there is a round orange sticker at the bottom of the inside of the canister. Use this as a reference when placing the baskets back inside. Make sure that the orange sticker aligns with the holes of the baskets. This is to ensure that the light is properly situated so that the UV light will work. This is a small but thoughtful touch on the part of the manufacturer. The unit is pretty quiet. If you are used to the sound coming from a hang-on-the-back filter, you will probably be happy with the reduction of sound from this canister filter depending on how you set up the return pipe. The pipe on my tank is set up to release the water back into the tank below water level to minimize splashing sounds. When I had a questions about the canister, I reached out to the seller who promptly responded and helped me. I am very happy with my purchase and the customer service and would not hesitate to buy the filter from this seller again.
Review: Gets the job done - After a month or more of comparing canister filters I decided to with the SunSun 704B. I have normally used Marineland and have been happy with their products. I decided for $50 cheaper to go with the SunSun. I will say the instructions are not the best but if you take your time and apply common sense you will get through it. The design is pretty standard for canister filters. I was surprised how much media this filter holds. I ordered extra floss and pads (which I didn't need to do) there are plenty included with the filter. I'm not sure about 525 gph but it definitely moves a good amount of water. The filter is plastic and all trays are as well but it seems fairly sturdy and should last for several years. The trays can only be lined up one way because of the way the top fits and the UV light slots have to line up. Makes it a little easy to remember each time. I can't think of any major issues I have with the filter and would definitely recommend giving it a try. The price is great ( actually a couple $$ cheaper) than when I purchased. Shipping was quick and setup was not bad.

## Features

- 5 stages with 9W UV, 525GPH (2000Lph)
- Good for up to 150 gallon fish tanks
- Dimension: 12" L x 12" W x 18" H
- Built in 9 watt UV sterilizer for controlling algae spores/bacteria and promoting clear water
- 4 Large media baskets for all your media need

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B015JMQRNC |
| ASIN  | B015JMQRNC |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #120,823 in Pet Supplies ( See Top 100 in Pet Supplies ) #587 in Aquarium Filters |
| Brand Name | SunSun |
| Color | White |
| Customer Reviews | 4.0 4.0 out of 5 stars (662) |
| Date First Available | September 18, 2015 |
| Date First Available  | September 18, 2015 |
| Directions | SUNSUN HW704B Canister Filter |
| Included Components | Filter, Filter accessories |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 15 x 19.3 x 12 inches |
| Item Package Dimensions L x W x H | 20.5 x 15.5 x 12.5 inches |
| Item Weight | 18.2 Pounds |
| Item model number | HW-704B |
| Item model number  | HW-704B |
| Manufacturer | Ming Trading LLC |
| Manufacturer  | Ming Trading LLC |
| Model Name | HW704B |
| Number of Items | 1 |
| Product Dimensions  | 15 x 19.3 x 12 inches; 18.2 Pounds |
| Size | Pack of 1 |
| Specific Uses for Product | Indoor |
| Target Audience Keyword | Fish, Reptiles, fish; insects; reptiles, insects |
| Warranty Description | 180-day warranty |

## Images

![HW-704B - Image 1](https://m.media-amazon.com/images/I/71+D59-JVlL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Value
*by Y***U on August 14, 2020*

After reading some reviews on Amazon and watching a few YouTube videos on the SunSun HW-704(B), I decided to purchase one for my 30 gallon tank. The unit was shipped out quickly and arrived in good condition. It seems that SunSun must have also quality checked the canister for leakage since the filter sponge was slightly moist. I am pretty happy with it and bought another one for a new 50 gallon tank a few months later. Although I only use it once or twice a week, it's nice there is a UV sterilizer light to sanitize the water. Some people seem to have issues with the light damaging the plastic trays, but this seems to be a problem only if the light is turned on all the time. I didn't see this as a defect, but took it as something to keep in mind since the heat from any light placed next to plastic can cause it to degrade over time. There is also a small indicator light on the top of the canister to let me know that it is working. The build on this seems pretty good. The outside of the canister is sturdy and it fits between the legs of my 29 and 40 gallon metal Imagitarium tank stands from Petco. The green hose can be fitted onto the inlet and outlet by softening the hose - just dip each end into hot boiled water for a couple of seconds before slipping it over one of the canister's nozzles. Once it cools, the opening will contract to form a nice tight seal. I have not had any issues with leakage using this method. Note that there is a round orange sticker at the bottom of the inside of the canister. Use this as a reference when placing the baskets back inside. Make sure that the orange sticker aligns with the holes of the baskets. This is to ensure that the light is properly situated so that the UV light will work. This is a small but thoughtful touch on the part of the manufacturer. The unit is pretty quiet. If you are used to the sound coming from a hang-on-the-back filter, you will probably be happy with the reduction of sound from this canister filter depending on how you set up the return pipe. The pipe on my tank is set up to release the water back into the tank below water level to minimize splashing sounds. When I had a questions about the canister, I reached out to the seller who promptly responded and helped me. I am very happy with my purchase and the customer service and would not hesitate to buy the filter from this seller again.

### ⭐⭐⭐⭐⭐ Gets the job done
*by R***S on July 26, 2022*

After a month or more of comparing canister filters I decided to with the SunSun 704B. I have normally used Marineland and have been happy with their products. I decided for $50 cheaper to go with the SunSun. I will say the instructions are not the best but if you take your time and apply common sense you will get through it. The design is pretty standard for canister filters. I was surprised how much media this filter holds. I ordered extra floss and pads (which I didn't need to do) there are plenty included with the filter. I'm not sure about 525 gph but it definitely moves a good amount of water. The filter is plastic and all trays are as well but it seems fairly sturdy and should last for several years. The trays can only be lined up one way because of the way the top fits and the UV light slots have to line up. Makes it a little easy to remember each time. I can't think of any major issues I have with the filter and would definitely recommend giving it a try. The price is great ( actually a couple $$ cheaper) than when I purchased. Shipping was quick and setup was not bad.

### ⭐⭐⭐⭐ Good package delivery but one of the items is broken upon opening
*by D***N on February 27, 2025*

Updated 11.7.25 It's been running pretty good. The only thing happened after 2 months of use was the UV light burned out. I did not realize that until the water began to turn green again. Had to buy a new set of light bulb to replace & been running good again since then (about 6 months now). I'm not sure this UV light went dead due to its problem, or it was me turned on/off so often every time I fed my fishes. This little issue killed 2 of my big fishes during that time. It was a mystery! Overall it's been running great so far. I dont turn on/off the UV light anymore. I keep the 4 stars the same. No change. The item looks pretty new. It was recommended by my buddy. The only thing I minus 1 star is because of on of the bolts to clamp the elbow mount was broken in half which makes it somewhat wobbling. Very disappointed. I will try the first run soon but not sure how good it will hold with only 1 bolt clamping the wall tank. I was about to ask for a replacement of the bolt only but it's such a hassle to go thru the return ordeal. Hopefully the manuf read this & send me another bolt is all am asking, otherwise I will have to return if it does not hold.

## Frequently Bought Together

- Sunsun Sun HW-704B 525 GPH 5-Stage External Canister Filter with 9W Uv Sterilizer
- AQUANEAT Replacement Canister Filter Pads Compatible with SUNSUN HW-304B/404B/704B/3000 CF500 Generic Filter Floss Aquarium Filter Media
- CNZ® Aquarium Filter Media Kits (Double Pack) - Activated Carbon, bio Ball, Ceramic Ring

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-10*