SunSun HW-304B 5-Stage External Canister Filter w/ 9W UV Sterilizer, 525 gph

May 20th 2013

Very simple set-up. I have been up and running with this canister now for 6 weeks. Priming was simple, good water flow, no drips or salt creep of any kind.. VERY QUIET as well. So far I am very pleased with the performance. I have yet to turn on the UV sterilizer since this is on a new Salt set-up. I will update in another month after I remove for first cleaning.. I will be adding more Bio-media.

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So I bought one of these filters for my 75 It works great. As for those that say its an older model of the aquatop that's not really true if you do you research on these filters sun sun is one of the largest aquarium companies in China they are the mother company not a cheap knock off I run all three models the 302 the 303B and the 304B the UV sterilization works great I'm testing these filters against fluvals. And yes they do work better. Stop paying for a name and just buy what works.

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Presently on a 200 gal. tank containing two 12 in. koi and fifteen 4 in. asssorted golds. Working great! Will buy another shortly for another tank.

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So I had big plans for these filters. Originally I had bought two to put directly into the bottom of a 220 gallon plywood tank but those plans fell through. The tank ended up leaking and I don't have time to fix it before I leave the country for 2 months. So I set both of these bad boys up on my 40 gallon tank with two messy turtles in it. I have a cascade 1000 on that tank that has done a decent job for its work load but it couldn't never keep the water crystal clear. It doesn't have enough current to push debris up from the tank floor towards the power head on the other side. Once I added the SunSun's, there was so much pressure moving the water it completely rearranged the substrate in the tank even pushing golf ball sized rocks out of the way. Pretty spectacular amount of water these things can push. Now any particles are quickly pushed around the tank in the water column instead of resting on the substrate and pushed into 1 of the 3 filter heads I have. I spent a few minutes just watching tiny particles speed from one end of the tank to the other straight into the intake hoses like they were magnetic! My water looks clearer than I'd ever seen it! and hopefully the UV lights keep it from never turning green. I'm hoping to be able to cut back on constant weekly water changes and possibly keep it at around every 2 weeks with these.

I put a lot of carbon pads, extra cut to size filter pads as well as 500mL of purigen in each filter on the top tray to polish the water as well. I've heard great things about purigen from fishkeepers everywhere so that might be a good reason my water is so clean as well.

Set up was a snap, all the parts came in a white box. more parts than you'll probably need actually. I didn't use the surface skimmers but its a good feature.

BTW I bought both of mine on ebay instead of amazon. Found them for 80 bucks each. total investment of 160 with free shipping from California to new england. what a steal!

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the seller was perfect to deal with, the product description was on point, and the filter arrived a day ahead of time. the filter has been running for around three months now, its operation is very quiet, and there have been no mechanical issues. if i ever decide to start up anlther tank i'll definatley be using a sunsun.

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