Popster
Member
Hi,
So I have decided to use corner Matten Filters on all my Guppy breeding and grow tanks. In this process I have been researching airlifts and indeed built one from YouTuber "Terrarienbau Berlin" informative video.
So the one I built is for 20mm OD PVC pipe and is 30cm (12") high tip to tail. I deliver circa 150l/h air to it (pump spec's, will still measure) and I am getting a flow rate of 400l/hour (105g/hour) which I think is amazing. There are 24ea, staggered and spiraled 1mm holes in the tube which is sealed in a "pressure chamber".
So as a person who hates noisy aquaria, with the outlet above water height it is a little noisy. I then dropped it to have the top of the outlet just below the waterline, dead quiet. But as the water is now being pumped into water there will be resistance to flow and the flow rate must be impacted.
What is the conventional wisdom, outlet above the water or below the water?
So I have decided to use corner Matten Filters on all my Guppy breeding and grow tanks. In this process I have been researching airlifts and indeed built one from YouTuber "Terrarienbau Berlin" informative video.
So the one I built is for 20mm OD PVC pipe and is 30cm (12") high tip to tail. I deliver circa 150l/h air to it (pump spec's, will still measure) and I am getting a flow rate of 400l/hour (105g/hour) which I think is amazing. There are 24ea, staggered and spiraled 1mm holes in the tube which is sealed in a "pressure chamber".
So as a person who hates noisy aquaria, with the outlet above water height it is a little noisy. I then dropped it to have the top of the outlet just below the waterline, dead quiet. But as the water is now being pumped into water there will be resistance to flow and the flow rate must be impacted.
What is the conventional wisdom, outlet above the water or below the water?