Aquarium fish tank Airstone Bubbler

This airstone is easily printable and can be adjusted to your needs

Printing:
In order to be safe in your fishtank, i recommend using PLA.
Print all parts in the given orientation. No support needed. Layer hight of 0.2 (or finer) recommended.
Print the disk with NO top and NO bottom layer. Choose rectilinear infill from 85-95% in order to generate a really fine mesh. See picture below
 

Please note: The picture shows rectilinear infill at 75% in order to illustrate the principle. In reality the magic happens between 85-95% infill density. In slicer and on the printed part its going to look like all the fine lines are fused together but in reality this generates the fine mesh we want. Depending on the desired airflow, one has to print two or three disks in order to hit the sweet spot.

Assembly:
If you fill the body with some gravel, the bubbler gets heavy enough for staying in place. The tool part is needed to tighten the ring properly. See pictures below

If you notice some smal bubbles escaping from around the Nut and the Ring, loosen and re tighten them a couple of times. This wears them in and should work. If for what ever reason there is still some leaking, you might apply a little petrol jelly on the mating surfaces between body/plug and body/ring. Petrol jelly is inert to your marine life, so dont worry.

If you are looking for a valve in order to regulate air flow, you might give this one a try