Jardin Aquarium Fish Tank Ponds Ceramic Air Stone Diffusers, 40mm Diameter

Love this product although there may not be any quality control associated with their production... 2 out of the 4 stones I ordered did not come in working order. Although the issue was an extremely quick fix. The nipple attachments on these are glued on with an epoxy. Unfortunately, if the epoxy is not applied perfectly it can prevent the airflow from the nipple to the stone. If this happens to you... don't freak out its an EASY FIX! All you have to do is find a drill bit that is slightly smaller than the inner diameter of the nipple and drill into the center of the stone for about a 1/4 inch past resistance and the stone will work perfectly.

With a bit of pre-shipment product testing this product would be fine.... otherwise its an easy fix with a bit and a drill! Hope this helps and enjoy!

I only use these diffusers. Believe me I've tried them all. I have a hydroponic garden and can't risk clogged air stones. These last forever and have a great effect on plants.... and fish I suppose!

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This air stone really surprised me. I hooked this up to my rena air pump for my 50 gallon tank and omg, the fine bubble output was amazing! A couple of weeks later my fairly new tank suffered a bacterial bloom. Bacterial blooms consume tremendous amounts of oxygen from the water but this little diffuser stone ended up being a life saver. While I did water change after water change in an effort to save my poor gasphing fish from sure death this stone (with air pump turned up full blast) put out enough bubbles to replace the oxygen and get my fish through the night. Heavy water circulation and this air stone did the trick not one fish lost. Cute shape and size is just right too. Would highly recommend.

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I bought this for a five gallon tank and I am so relieved I will be upgrading to a 20 gal soon, this is way too powerful for my tank. That's okay! I'm extremely satisfied with how powerful the stone is and how many bubbles it lets off.

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These air stones are the best I have ever found. They are expensive but in my opinion they are worth it. They are about the size of a quarter and have a good amount of weight to them. They stay in place in my fish tank and provide allot of bubbles. I have never had one clog up on me.