7.5"*3.6" (3 pack)

I bought these specifically for use with fine-grained filter media such as Phosguard, Purigen, and Hypersorb. I have used these for long enough to trust their durability.

I'm surprised how fine the filter is for filtering. It worked great for what I needed it for; however, my little experiment ended up somewhat in a disappointment for me. I had rigged up a previous and out-of-date water pitcher that I had which takes those really cheap water filer, and I managed to fit the extra fine filter into the hole where the water filters normally goes for filtering, and I added activated carbon to it and overfilled it so there was bulge of activated carbon above the filter hole. The setup was perfect. However, the water went through the activated carbon really fast. It only managed to filtered out 10 TDS in the first pouring. I guess if I continuously refilter the water, it might bring the TDS level down somewhat. But the extra fine filter will definitely prefilter large debris in the water such as very fine sand. When I added the activated carbon to it and pour water to it for the first time, very fine powdered carbon came out of it which is normal on the first flush. Thereafter, the water was very clear. I guess if I used it for a fish tank, it would more than likely make that water crystal clear because of continuous filtering. The reason for the rig-up was I trying to make my ZeroWater filter last longer so it didn't have to work so hard in filtering. Those ZeroWater filters are extremely expensive yet it is the best water filter I ever used.

Works great, I tied it to a hose from the outlet to my new surface skimmer to catch all the duckweed that found it's wat thru the skimmer.

I used these on my veggies in the garden to keep the pests away. They fit great

Purchases to use for slowly dissolving Pool Stabilizer granules. Just filled and placed in skimmers for water to flow over and initial impression is well made. Would appreciate a cord lock being included, but since these are probably commodity priced an option to add them.

Bought this to put purigen in for my aquarium. Bag is a little longer than I expected. It ties securely and no purigen escapes into my water.

works well for its purpose

These worked well they held in the Purigen well no problem. I think next time, though I’ll get the zipper type.

Cumple con el objetivo por el cual lo compre, para usarlo con purigen

Many reviews are for the smaller size so i thought I’d review the larger size. These are bigger than I needed, but the smaller size was too small. It’s OK, I will make it work. They don’t have a clasp for the drawstring, so you will need to wrap it around after pulling the drawstring or find another way to keep it closed. The sewing seems good, and the size of the mesh is good for what i need for my aquarium. These are flat bags, like an envelope, so they crinkle up a bit at the bottom when you wrap around the filter or pump (whatever you are using this for)- so its more like a sock, not like a freezer bag that you can stand up to fill. Thats fine, it’s just like the item description. I think these will hold up to multiple cleanings and wear and tear so I'm happy with the quality and price point.

I use 2 of these bags in each of my filters ,, really good quality and fits heaps of bio in

These are good quality bags with good stitching. Works with Purigen.

la ocupe para colocar el matrix y en otra para la resinas el poro es muy pequeño que filtra de manera perfecta.