Aquatic Experts Bio Balls Filter Media Bulk, 1.5 Inch Large Bio Balls for Pond & Aquarium Filters, Pond Filter Media for Outdoor Ponds, (300 Count with 14" x 20" Mesh Bag, 1.5 Inch)

I have been using fiber filters, but they breakdown too quick. The Balls were very inexpensive, and easy to install. The balls have trapped so much algae breakdown. Balls are easy to clean, we have a bucket with holes drill in bottom, pour balls in bucket and just blast them clean. Balls should last a very long time? All around money saver for my pond maintenance. Once new balls have been installed, I have notice pond water stays cleaner for a longer period of time. I would recommend this item for your pond water cleaning.

works good gathering a lot of the algae and debris

They seem like a good product but we're using them in conjunction with matala pads to biofilter a duck pond and I'm not sure we've got enough filter material in the bog pond.The balls float and we originally weighted the bags but then tied them together as a last filter before the waterfall without the weight. Can't say I've seen a difference in water quality no matter where they are but I'm pretty sure I just need a lot more filters to grow good bacteria.We are trying to handle filtering around 850 gallons of nasty duck water with up to 8 ducks, soon to be 7 once we rearrange a boy to a different zone.I think these might be better suited to a cleaner environment, like coi or ornamental ponds.

What a brilliant product! SO much better than those old dirty lava rocks. Easy to clean with a good hose. My pond water greatly improved after adding these

I've used the bio balls that snapped open a few years ago. They did a great job but we're almost impossible to clean. These are a great change if only for the ease of cleaning. I use them inside the pump box as the final filter in my the 3rd portion after 2 pre filters. Extends weekly cleaning to 3 weeks in Koi pond.

These are the greatest thing! We've always used lava rock & found it to be a pain to clean & care for. We do have a back yard pond & are using these Bio-Balls ~ they add to a much better filtration.

I have a similar product that came with the filter & wanted a backup. The original product is a larger bag with a draw string. This one is a smaller bag with a zipper. It doesn't actually fit in the filter as well a it should. Disappointing.

The bio-balls in the mesh bag were as described and arrived quickly. All appears to be good quality, too.