However a few of my ghost shrimp died within minutes of starting the system, due to my naïveté regarding co2 systems I didn't have the regulator set low and the bubble count was at least 50 right out the gate, but my fish are all healthy and swimming around, they actually seemed perplexed about the stream of bubbles and are sitting next to it watching. Now I'm testing out the timer, the small amount that comes out when the solenoid off is called a night flow right? It's like 1 bubble every 4-5 seconds.