Pawfly Aquarium Air Stone Bar Bubbler 4 Inch, Fish Tank Bubbler Stone with Plastic Base Square Oxygen Diffuser for Nano Air Pump Small Bucket and Fish Tank, 4 Pack

These work great in my homemade kitchen deep water culture hydroponics system in conjunction with an air pump. It's a good idea to replace these every 1-2 grow cycles because the hydroponic nutrient solution can cause issues with the air stones. Treat them like a consumable. For the price, these are a lot easier to stock up on than going through a hydroponics or pet store.

Very pleased with bubbles, cheap price because when they get dirty, washing them is not effective

Perfect bubbler for fish tank and other projects.

The media could not be loaded. I saw reviews say that the bubbles don’t come out even, and they don’t, but I personally don’t think that takes away from the beauty of the bubble curtain. It looks fantastic in my tank, and I’m hoping it will be entertaining for the figure 8 puffer I plan to get when this tank cycles!I also saw that it clogs pretty easily, so I’m prepared for that. Half my tank is sand, so that may clog, but the pack of 4 was reasonably priced so I think it will still be worth it even if I have to replace it every few months.I bought the little $5 Tetra Whisper pump and it has plenty of power to create a strong bubble curtain! The only complaint I have is that it makes the top of my water very fizzy, so the underside of my canopy is constantly soaked. If I had any holes in the back of my lid over where the stone is, it might pose a problem with water splashing out of the tank.

2 worked. Somewhat. The others didn't. So I never used them. I needed them all to work.Buyer beware.

The media could not be loaded. These are so much fun. Wish I could post multiple videos. I can't capture still shots very well. So far I have 3 in use out of the 4 in the package. The 1st shown is under the bridge. It is larger than the bride so it is angled with low air pressure showing a few single bubbles it gives off in the ground in front of it and then an explosion of bubbles every few seconds from the actual bridge. The 2nd is under Poseidon. His base is wider than the wand and he sits on a rock so I angled him to get the effects I wanted. It even looks like I have more air wands running than I do. The 3rd is in my shrimp tank lol. The bubbles keep my mermaid sassy floating amist their spray singing her seiren song luring the little shrimp for her entertainment and mine.I'm very happy with them and I'm sure I'll be ordering more in the near future. I've been into aquariums for 30+ years. These seem well made and durable. I have bought more expensive junk in the past to try and do what I could easily accomplish with these. And bonus at an affordable price. You have nothing to lose and everything to gain.So as far as giftable... if your friend is into aquariums or your a secret Santa and you know their into fish... your gonna be a hero. My shrimp tank is a 10 gal and the other 2 are in a 175 gal so there really isn't a tank size limit for these. The only limit is your imagination

I ordered four of these and they don’t work. Don’t waste your money on them.

Beautiful air curtain, great quality.