The cones are made from Crystal Geyser 1.25 liter soda water bottles. They have a very steep neck making am ideal hatching come. With the bottoms cut off they are 1 liter. I use one liter water, one tablespoon salt, a pinch of sodium bicarbonate and up to one tablespoon cysts. The simple cone is used to hatch. To harvest, let it settle and the empty shells will float to the top. Squeeze it so the floating shells overflow into the sink. Then I pour of as much water as possible leaving the shrimp and the sinking shells. I then refill with supersaturated water from the tap. This is done by blending hot and cold water till it is milky with gases. This floats the sunk shells. I squeeze the container again after every thing has floated. Then input it into the collection cone which has a bulkhead out the bottom for the final collection through a 105 micron sieve. Total time spent is about 5 minutes collecting. One minute to reset the cone and a few to feed. 10 minutes a day for 2 live feedings. It not bad. All fish get brine when I'm hatching. Large fish will eat bbs (baby brine shrimp) including large Ranchu and even 14 inch tanganyikan tilapia.
Positions are marked AM/PM but I usually just look at the color, red on the right and hatched, brown and unhatched left.
The light help hatch the photosensitive cysts.
The hanging hatching cone and sieve. I usually just collect the concentrated shrimp off the bottom of the cone without washing.
1/4 inch bulkhead and tubing clamp out the bottom of the hatching cone.
1/4 Tubing bulkhead.
The sieve is made with 3 inch pipe, mess, and a cut off socket from a pipe fitting. It is simply held together with friction so the mesh can be removed for cleaning or replacement.
Size of the mesh.
Another view.
