CO2 tanks and check valves
Okay, this is a newbie question, but I have never used a check valve with my CO2 bottles. Are you using the check to keep the yeast from getting in the tank, or the tank from draining into the yeast bottle? The other day I disconnected my CO2 airline hose before bed and forgot to make sure the water was drained out of the line before I wandered to bed. In the morning the whole tank had drained out, but luckily it was only a 1 gallon tank and I had a towel under it. It drained to the gravel, but I didn't lose any shrimp, thankfully. I don't suppose the check valve is supposed to be to keep stuff like that from happening, is it?
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.