COOSPIDER Aquarium Filter 200GPH U-V Fish Tank Green Clean Machine for 20-100 Gal Tank, Submersible Pump Filter for Green Water, Internal Filtration System for Saltwater Freshwater Crystal Clear

The seller was very helpful and quickly solved my problem. I really appreciate their excellent customer service and support. The product, Coospider aquarium filter, works great and performs as expected. It keeps the water clean and clear, and it’s easy to use. Overall, I am very satisfied with both the product and the seller. Highly recommended!

As you can see this U-V filter completely turned my tank around! I was changing the water every 3 days and used/tried just about every product on the market to try to avoid the water turning back green 3 days after a complete water change, but nothing worked!! In my final attempt I purchased this U-V filter and in just 5 days it completely turned my tank water from green to clear. It looks like I did another complete water change, but I did not. It went from green to cloudy to crystal clear. I standby this product. If I had to rate it, it would be off the chart!!! I highly recommend this filter

I bought a JUB-01 in Jan 2024. Installed it in a 70 gal turtle/fish aquarium on my light timer so it only ran about 10 hours per day. It worked great when it was first installed and cleared up the cloudy water in a couple of days. I recently noticed the water getting cloudy again and saw the light was not blue at the bottom. I pulled the filter and when I opened it up the inner quartz tube around the bulb was totally filled with water. The bulb was corroded and shorted out. I am a Plastics Engineer and started looking at the O ring interface to see if silicone grease or a thicker O ring might help fix the issue. However I noticed that it looks like the factory applied a layer of "glue" inside the molded cylinder where the O ring on the quartz tube is supposed to compress and seal. It might have worked, but was poorly executed. It was not smooth and has ripples in the glue surface so the O ring cannot compress evenly and seal. This was not normal for this type of design and after 20 years of working with Chinese suppliers sourcing plastic parts for major US companies, I am guessing the molding diameter was out of specification. To save a few bucks, rather than scrapping the parts, they tried to rework them using a "glue" wiped inside the plastic cylider to decrease the inner diameter by 0.5mm or so and better compress the O ring. However there are large ripples in the hard glue surface so it is not even and there is no way for it to make a good/even compression of the O ring around the entire circumference. Maybe it was smooth enough to work sometimes, but If you get one of these and see a "glue" build up where the quartz tube/ O ring is supposed to seal I do not recommend using it. Just send it back. Looking at reviews from late 2023 to early 2024 a lot of units reported leaking. I'll bet they all have this "glue" rework inside of them. They need to fix the molding process or modify the molding tool so it has the correct dimensions for the O ring to seal without adding crap to the inner sealing surface as a band-aid.

UV filter works extremely well. The results speak for themselves—my tank went from a bacterial bloom that turned the water green to clear in a short time. I didn’t have enough premixed saltwater for large water changes, so this was a great alternative to quickly control the issue. It’s easy to maintain and clean, and it pushes a strong flow, which also helps create good water movement in my reef tank. Overall, a very effective and practical solution for improving water clarity.

I'm using this as a filter/pump for a small 375 gallon float pool. I've never used one of these before, so I was hoping there would be complete instructions, but the paper that came with it was quite lacking in any useful information. More warnings than anything. So you have to figure it out on your own. Somewhat easy to do, however, I still had questions... At first there were no air bubbles, and the filter end kept floating to the top of the water causing it to suck air through the filter... I had to take the plate off the back of it that holds the suction cups, because the edges were sharp and I didn't want it to tear the bottom of my pool, so the one suction cup did not stick and I was relying on the weight of it to stay down at the bottom... I finally figured out I had to physically hold it down on the bottom until all of the air bubbles came out of it, then plug it in, facing it with one jet facing up and one facing forward into the pool in order to make it stay at the bottom. Now I'm getting the air bubbles. It really moves the water well... So it's nice and powerful. I've been using it for 2 weeks now, pretty much non-stop, so it's doing it's job well, and there isn't any water getting into the UV lamp. The air hose is entirely too short for my use, so I had to buy a longer one. There is no hose supplied to use it as a pump to pump water out of the pool, although the description says it can be used to pump water out, So I'm going to have to rig something up to use it for that application. **In short, it's powerful, aerates well, easy to clean, but lacking in instructions. IMO it should have a longer air hose and a hose for extraction pumping. It would also be nice if the power cords were a little longer.

I have a 240 gallan aquarium with a 75 gallon sumptank. When I travel out of town for a week or so, I cut off the sump and put this inside my tank. It works perfectly and my water stays clear and fish are healthy. When I return home I turn my sump back on and clean and store the temporary aquarium filter until I need it again

Best filter Ive purchased and I have gone through tons. Its super easy to clean, use, and set up. Versatile- you can stick it anywhere in the tank flat or up and down. Keeps water clean, UV bulb lasts a long time. Had to buy aquatic glue to stick the cover on as it kept popping off (my turtle is kind of a jerk) but had no issues. Would buy another one if needed.

Excelente. Me ayudó con el agua verde. Intente recambios mas seguidos. Caracoles y nada. Este filtro. Aunque un poco grande. Si funciona. No evita que que las paredes se pongan verdes. Lo que hace es limpiar el agua. En dos semanas de uso se ve muy bien la pecera

Sería bueno que tuviera un apagador por aparte de la lámpara.

No se percibe cambio en la coloracion del agua y la cantidad de alga.