SunSun HW303B 370GPH Professional Canister Filter Kit with 9-Watt UV Sterilizer for Aquariums

CTCT: I've always had a Rena xp3 (10+ years) that I've been replacing parts on. Sadly it broke beyond repair and they no longer make em. I did a lot of.. and I mean a lot of research to find a new filter that, to be blunt, wasn't an overpriced pile of junk. I came across the sunsun brand and was skeptical for obvious reasons. Everywhere I looked sunsun came up and had really good reviews and a built in uv sterilizer which are expensive to buy seperate. Lots of reviews stated that the uv light was unpowered for the filters rated size of aquarium... but like I said I did my research and found that the 9 watt uv light was the exact spec for my 40 gal tank. So after all the research I figured I'd give it a try and settled on the 303b pro... and yes I realize the filter is rated for a way bigger aquarium but I like to overfilter. Anyway when it arrived I was more than impressed by the overall appearance and build. So I put it all together (instructions suck by the way) but I didn't need them anyway. I put the sponges in the bottom, biological in the middle, and carbon pack in the top. Installed it with the new hoses, filled the canister with water, primed it, and off she went. Wow am I...

United States on Mar 12, 2023

Kevin P.Kevin P.: The Sunsun Hw 303B is great. Just finished setup in my marine tank. Read the reviews and tips. Mostly about using silicone lubricant (do not use Vaseline it will dry out the seals and crack them use silicone food grade lubricant only) on all the seals and purchased some of that as well. Turns out the company must be listening because all the seals were already lubed sufficiently from the box. Setup went very well with no leaks and it’s very quiet. I had modifications I had to do and the parts they supplied for the send and return were just what I needed with some careful thought. Be careful if you need these parts the cheaper ones may not come with them. They are less expensive because they don’t include the various nozzles, hoses and fittings.
The only glitch I ran into was a big one if I hadn’t had some experience with these filters previously. The pictures I have supplied show the indicator for the uv light. This is what shows you the light is on or off. It’s just a plexiglass shaft that goes from the light chamber inside to the top of the unit. 1st pic shows it (circled in red) on the inside. It should be flush to the bottom of that area. 2nd pic shows it...

United States on Jun 27, 2022

Rod SweetRod Sweet: I was excited to receive this item. On arrival, I connected it up, primed the canister and started the motor.
The motor ran for only 30 seconds and then cut out. This was enough time for the medium provided to cloud the tank. I tried all the fault-finding including clearing the impeller. The motor seemed to be overheating and after 20 min ran again for only 30 seconds. I tried this over and over but the motor kept cutting out.
The instructions were also light on and vague, with no mention of where to get support.
I may have received a faulty item and will try to return it.
Back on my old filter now which is not capable of clearing the water so I will need to water change again, then purchase another filter.

Australia on Dec 29, 2020

CoocoomungaCoocoomunga: Overall I am happy with this filter, but I am new to canister filters and it’s only been a week running. I however am not new to keeping an aquarium and have used sump systems and hang on back filters on and off for over 30 years. I ended up purchasing the sun sun after reading many articles on best filters, the sun sun customer reviews, and watching YouTube videos on maintaining them. My experience so far is positive.
One of the zippered mesh bags holding the ceramic rings was torn, but that’s an easy fix with needle and thread- the bag is not really needed anyway. Everything else was in great condition.
The instructions are short and you have to read into them, but all in all they are okay if you have good problem solving skills and an imagination.
One thing I read about often is leaking of hoses due to the plastic fittings provided with the filter, and compatibility issues with in line heaters. I purchased the datoo inline heater (I think it’s a sun sun one with a different name- it monitors in Fahrenheit instead of Celsius). I had zero compatibility issues and have experienced no leaks. It’s almost unbelievable because so many experienced aquarists are...

United States on Apr 11, 2020

Silverman: Gran potencia y excelente filtrado.
Luego de 1 mes de uso hace muy bien su función. Los accesorios que trae se ven de calidad.
No he tenido ningún problema de fugas. Es muy silencioso.

Mexico on Dec 06, 2019

Martine: Good Product, Fast Delivery

Canada on Jan 07, 2019

Marco: this is my second one.... and i loved it

Canada on Oct 27, 2016