Easily sinks to the bottom of any container. I will definitely buy more. Lots of bubbles! I turn the air to them down a lot to get a gentle flow in my plant and snail containers. They can make the water "boil" when on full blast with the co-op single line air pump. Schweet! (My camera was not able to capture the bubbles, imagine bubbles in the picture! )

Works good so far i put a sponge in the corner dropped one of these in the middle put a aquarium co-op suction cup on the line to old it to glass to me looks pretty good 👍

Exactly as advertised, they make having air stones easy to manage and hassle free by staying where you place them

Wonderful product, stays on the bottom and blends in as advertised. I've switched all my tanks over.

Love this easy to set up and my Cory’s are having a blast playing in the bubbles.

The air stone works great. They stay down without help. I use them in my daphne tubs and the bubble size is perfect.

So these airstones are super cool, they come apart to make different sizes and they fit in a sponge filter if needed (which is what I do). They are green and blend in with my live plants (if I use them outside my sponge filters). Honestly I go to this place for all my aquarium needs. I follow them on you tube & I live close to one of their partner retailers in Cookeville, TN. If I can’t buy it there, I hop online to get it here. Aquarium co op has my heart forever, HUGE FAN!

Love the weighted version of the air stone, works as described. The amount of air bubbles is also impressive. I have 15 tanks and I see myself buying these again in the near future.

It's a perfect weight! I love that it does not need a plastic glass cling holder thing.(LOL) Which for some reason never stuck for me. However, this product will not float to the top. I also love that I can position it however I want in the tank and it not having to be up against the glass. The fish can actually go around the bubbles.

They work great. I am using three to experiment with how big or fine I want the bubbles in the back of the aquarium

I got 4 of these airstones to give them a try and I am very impressed with them. I have been using them for a month and they have not degraded if flow whatsoever. I was worried about the bubbles being too large/loud however that is not the case. They have the same bubble size as the oase airstones I had laying around however those degrade fairly quick and clog. I suspect these will never clog and if they do a quick sink rinse will fix it as they are just solid plastic.

Seem to produce the perfect size bubble for an under gravel filter, have them running 75, 40, 29, and 20L ugfs.

I always but a line of air in my tanks, nine to be exact. I would fight with rocks or something to keep the air stone down. I love these air stones. All I have to do is connect it to the tubing and drop it in the tank. Man I just "love" these air stones.

So far, so good, but they've only been in use a few days... I can say they haven't floated like the Ziss air stones liked to do... I think I'm gonna stick with the cheap ones that are available everywhere over any of the plastic ones though...! I guess if you only have a tank or two they'd be OK, but I'm back up to around 70 active aquariums again... Thanks again for another great product, but this one isn't gonna be for me...

I really love these air stones. They are working out nicely in my sponge filters from ACO as well! I love that you can adjust the size to fit even the nano sponge filters with ease! I will be getting more and making sure all tanks have them!

Great air stones. Works perfectly in sponge filters.

I love having extras of these on hand. Great price on a great product.

Simple and reliable. This was totally worth purchasing for my tanks.

This really is the perfect air stone you can add sections to make it bigger you can put a ton of air through it without it floating. I’m mainly using it to keep water aerated and mixed in a trashcan that I use to remineralize RO water I don’t have a picture yet, but I’m currently trying to make the largest air stone ever with the extra pieces that come with the under gravel kits

Great airstone best on the market!!

Love it😆😆😆😆😆😆🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰🥰

I love that you can adjust the height of the air stone and that it is weighted. Great job Aquarium Co-Op!

The Aquarium Co-Op Weighed Air Stone is a great addition for aeration. Easy to clean and stays put. Prefer over traditional air stones.

Love these air stones. Haven't ever had one clog, they're infinitely expandable, they sink, and they fit into a filter.

The bubbles are a little larger than normal airstones, but in my opinion, it's 100% worth it to never have to unclog them