Yes my water also gets a little pushed back out of the Bubble counter I installed a check valve before silonoid. Do not allow the water to get inside the regulator it can damage it or create rust. Also get a check valve that is meant for CO2 I recommend ista stainless steel check valves I have tried many others in the last 2 weeks and the water from the bubble counter has gotten through them all except this one. Also glad you stopped the CO2 during the night as the plants produce CO2 during the night which can be dangerous to live stock in the aquarium
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