The second bottle is the bubble counter isn't it?
I just looked at the picture before and it looks like you have a check valve in the tubing line. If I remember right it will somewhat impede water if it flows from the bottle to the tank (versus 100% protection from siphoning water from the tank to the bottle). You might be ok with it. But a more rigid bottle would be best if you have one lying around.
Congrats on the fry.
I just looked at the picture before and it looks like you have a check valve in the tubing line. If I remember right it will somewhat impede water if it flows from the bottle to the tank (versus 100% protection from siphoning water from the tank to the bottle). You might be ok with it. But a more rigid bottle would be best if you have one lying around.
Congrats on the fry.