Good morning friends!
Like I said, Im not talking that its not a good product, I know it and it's a product that makes what says in the box, great these days ahaha
But what we are trying to say is that you can get same of better efficience with anything else. If you can get your hands in some lab equipment, a separatory funnel will do your job without spend that much and giving that pro touch to your room.
I use 2 types of my homemade hatcheries. the first is a separatory funnel like, and the other is based on the SERA kit.
first usage: about 500ml water. When I wanna BBS I close that valve to stop air and let the shrimps go to bottom. Then I prepair my net under the valve and open it slowly and closing it when I got enough BBS on the net. Connect the air tube again to valve and open it slowly again to get bubbles again. If I want to remove empty shells I siphon top layer of the hatchery only. If I have too many shells I can siphon all water to another bottle, close the valve as soon as all BBS goes out.
Second bottle usage: about 200ml water. its basic the same but works on the air pump and not gravity. With this hatchery bottom you have more tendency to have more deposit in bot, but just increase air flow and it will be no problem. This bottle have two holes. One is the bubbling sistem, the green tube, that is connected to a rigid tube (in my case its the body of a pen) and the other hole have another bit of transparent tube, this is obviously for the air not acomulate in the bottle. When I want BBS just disconect the air pumb from the green tube and conect it to the transparent one, that will reverse the sistem and makes artemia climb the green tube draining it continuously to a net in front of it.
One more thing, all sellers claim on light and a lamp only for them. I dont care too much about them, I give when I can, but they like light very much for sure! so that all black hatchery will do the trick if you wanna them to stay alive more time?... I dont know
All the best, sorry for the long text and bad written