HW-704B

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.

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.

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.

En particular este modelo HW-704B 525 GPH tiene materiales de mejor calidad, trabaja muy bien y mejoro la condicion de mi acuario

Easy to assemble and perfect for the bigger size of aquarium. Highly recommended.

MUY BUENO, LE CABE UN BUEN DE MATERIAL FILTRANTE, BUENA POTENCIA LO UNICO MALO QUE CUANDO LO TRATAS DE ABRIR PARA DARLE MANTENIMIENTO PIENSAS QUE SE PUEDE ROMPER

Lo compre de reemplazo por uno de los que tenía instalado, por error pasaron varios meses sin mantenimiento y se me quemó. El único pero es que no recibí el foco UV y su funda.

Se supone que un filtro de acuario succione agua por la vía de entrada, la circule por los diferentes componentes y la devuelva por la vía de salida, pero no funcionó.