These airstones are great for use inside of sponge filters. Air stones in general ensure oxygen levels remain high in the aquarium. Never clogging airstones can be taken apart and cleaned vs being thrown away from long term use.
The size of the bubbles is close to just putting the air hose in the water without an airstone, but it is just 99 cents!
I attached a suction cup and ran it toward the bottom of aquarium. My harlequin rasboras and otocinclus love to use the bubbles as a play area! Thanks for the great products and service.
Great sized bubbles and definitely do not clog. I just added a suction cup to place it where I wanted it and the bettas love to play in the bubbles.
I use this as my 24/7 air stone in a 55g community tank and it works great.
I have sponge filters and the air stones where clogging all the time and these never do