Aquatic Experts 200 Micron Drawstring Filter Sock - Filter Socks for Saltwater Aquarium, Sump Filter Sock, Freshwater Aquarium Filter Sock - Custom Made in The USA (4 inch by 8 inch, 8 Pack)

I'm using a 350 gallon repurposed hot tub for large Bream fish with a 2 submergible pumps one of the submergible's goes through a TetraPond Pressure Filter before exiting back into the tub, after installing these filter bags the backflow was shooting up through the top of the bags and I was losing 5% of the flow onto the concrete floor, it would have been a disaster if I we're gone because of a emergency, the tub would have been empty, so I'm going to have to rethink the overflow issue, What I desire would be a much longer filter bag that would hold a much larger capacity, I saw one on a YouTube channel but apparently this manufacture doesn't have anything like that, Outside of that issue the filters does a very good job clearing up the murky looking water, hopefully when the water is crystal clean my frequent sock changing will diminish, but I still would like to have a 4" x 36" filter bag.

Fit just right in my Cobart CVU40, was having issue trying to get their filters.

Study Filter Socks, Spray them off in Laundry Sink, and run through Washer, Cold Wash, Cold Rinse, heavy on the Clorox, double rinse and they are ready to go again. They last longer than Foreign made Socks, at a Comparable price.

I use these on the nutrient solution return lines that drain into my nutrient solution tanks in my greenhouse. I couldn't have more filters but the added improvement i get from using these is more than significant. The draw string makes them fairly easy to use (the material is rather stiff and the opening is much larger than my tubing.) as I tighten them around the 3/4" vinyl and 1/2" PVC tubing I use for return lines. I no longer battle continually with clogged emitters. After a couple of months on the job I toss them. It is amazing how well these bags work for me considering that they are not made for this use. Talk about bang for the buck. I could go on and on but I think that you get that I'm happy with them. Now Aquatic Expert people, just one thing. How 'bout a size that is easier to fasten around the tubing? Same size and style, just a smaller draw string opening. What, do I have to think of everything?

Thicker than the 200 micron filters I was getting from the aquarium supply store. Also they are easier to clean.Update 5/1/2023: I did find that when I bought a second pack this one had a coating on the outside making them very stiff. This second batch was more difficult to clean because the coating made them difficult to turn inside out.

these work very well, making a tremendous difference in water clarity after 1 or 2 days of use.

I'm using this with a 500 gal pond and it was able to capture very fine particles from the pump, and it was very easy to clean, just spray with hose and rinse away the dirt.

I switched from foam filters to these in my 50 gallon bait tank. Wouldn’t go back if you paid me! Much easier and the water is just as clean. A little more troublesome to clean just BC you have to flip them inside out but I doubt buy filters for their easiness to clean and They do their job very well.