AQUANEAT1.5 Inch Air Stone Disc, 4 Packs, Aerator Bubble Diffuser, Air Pump Accessories for Hydroponics, Aquarium Fish Tank, Ponds, DWC Reservoirs and Circulation System

Large enough to circulate my55 gallon fish tank.

These put out a lot of bubbles, much more than the cheap junk stones of similar size I got at w-mart. Bought for hydroponic gardening and so far so good. Will buy again as needed.

A bubbler for a friend, perfect for the purpose.

The picture only shows the larger 4 inch size which seems to have at least a two-tiered barbed connection. I bought the four smaller ones assuming that it would be the same connection but it’s not. It’s not barbed at all and was bigger than my hose. I had to spend a lot of time soaking my hose in hot water, cutting a slit in it, and putting on clamps to keep it the hose on. A lot of work for what could have been much more simple if there was a barbed connection. I would not recommend the smaller ones to anyone who values their time.

Purchased twice. Can only get half of the stone to bubble with 8 watt air pump. Returned one.

I use these for DWC in 5 gallon ( or 3.5G) buckets - I put the air line into the bucket, and have a tee with each side is going to one of these 3" air stones - for a total of two of these 3" stones in each bucket, and they are great, lots of air bubbles. I use 2 for more air, but also to balance the water motion in the bucket - I have found using just one can cause a circular motion of the water thereby twisting the roots, making less air roots.I tried 4" but thats too big and are prone to sitting sideways or kinking the line.2"are too small and end up "glugging" as the few bubbles collect into bigger bubblesI have bought many of these and will continue.

My filter pump stopped working so I purchased this product. I use one stone in my 3 gallon beta tank. It keeps my tank clean twice as long as the filter did. Why? You ask. I have no idea... maybe the water moves more. One more plus, my beta loves the bubbles. He wasn't sure at first. But now he races through them. 😆• It's my opinion this product is a GREAT value for the $.• FYI. This product has no suction ability. Is is designed for an air pump to push air through a connected hose and through the holes in the "air stone".

Fish love it and so do I.