Pawfly 4 Inch Air Stone Grey Mineral Bubble Stone Bar Diffuser Bubbler Airstones for Air Pump, Aquarium, and Fish Tank, 2 Pack

Works great

Great profuct

I've been using Pawfly for a couple of years, they start out great but do not last long whatsoever! They are not cleanable as they claim to be. I've spent a small fortune on all of the sizes available, still the same resolve. Seller is very good at giving you a refund, but what can I say. At least they dont desinergrate like most airstones due. I have 4 Aquariums, a must have if you have a 25.5" Pleco. Experienced Aquarist know what I'm talking about. Also you must know this, if you lose power even with a back flow preventer, these stones quickly become useless in a matter of weeks. So far these Grey stones vs. White stones, White stones cost more. Sorry Pawfly, I'm only using this product now in 1 tank, the Pleco tank. There is no competition yet, that can match Pawfly, trust me I know because I'm the one that tries products in hope that I can find a better quality or solution. Pawfly wins hands down. This Seller and Amazon know this. Great short term product and value, compared to in person Pet Stores. There you pay almost double for same product. Seller 5 ⭐'s, product 3⭐'s.

Only one was the fine nano bubbles. Other had hole so bubbles poured out in huge stream scaring fish

1 of 2 work. It does work nicely (as in 1st pic). Other one pushes large bubbles out of one small area of the stone-not even distribution and makes a loud bubbling noise, something is off with the airflow. No it’s not my pump because I’ve tried defective one with 2 different pumps in 2 different tanks. So then, my ONE replacement has arrived and it’s broken-the stone itself has a long thin plastic piece/sliver partially off AND the port where the plastic tubing should go that comes from the air pump-that’s completely broken off. So, here I go again. I need to request another replacement.

this produces a lot of micro air bubbles

I bought this one because it was on a cheaper side. But I am not sure if I like it or not. The pump I was using was not the most powerful one (mini pump) so the bubbles were not fully coming out but only from one side… will try with a stronger pump.

I like this airstone. I have it in my 3 gallon nano tank stocked with shrimp. If the air flow is turned up, it pours out a load of very tiny bubbles. But since it’s a shrimp tank, I use a flow regulator to reduce the air flow. It still puts out lovely and light bubbles to help aerate the tank, but they are delicate enough so as to not bother the shrimp.

This air stone comes with a suction cup holder to hold the air line to the inside of the tank. Nice touch. however, the holder clips are just a bit large and do not hold the standard air line well.

quatre étoile sur cinq parce-que j`ai reçu 1 kit qui ne fonctionnait pas très bien sur 4, sinon elle sont les meilleurs que j`ai eu. ( 4 étoile et demie sur cinq)

Je les croyais plus moins large. J’ai mal regardé

These work fine.

The stones I received unfortunately didn’t bubble