
Classic Bubble-Up Box Filter -w- Suction Cup Bottom
thingiverse
Designed specifically for use with activated carbon and cotton-ball wadding in small hydroponic or aquarium environments, this product is a game-changer. We took matten79's air-stone design to the next level by remixing it: https://www.thingiverse.com/thing:2507701. The suction cup hole measures 7mm, allowing for smooth passage of 8mm nipples. Standard 24-30mm suction cups will work perfectly with this print as-is.
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