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Livewell
A wooden livewell (container for live bait), towed by fishing boat. Exposition in Fisheries Museum in Hel (branch of National Maritime Museum in Gdańs
A wooden livewell (container for live bait), towed by fishing boat. Exposition in Fisheries Museum in Hel (branch of National Maritime Museum in Gdańsk)
Fountains aerate water by spraying it into the air.
Fountains aerate water by spraying it into the air.
Typical mechanical surface aerator at work. It is often difficult for this type of machine to aerate the entire water column.
Typical mechanical surface aerator at work. It is often difficult for this type of machine to aerate the entire water column.
A one-horsepower paddlewheel aerator. The splashing may increase the evaporation rate of the water and thus increase the salinity of the water body.
A one-horsepower paddlewheel aerator. The splashing may increase the evaporation rate of the water and thus increase the salinity of the water body.
Fine bubble aeration is an efficient technique of aeration in terms of oxygen transfer due to the large collective surface area of its bubbles.
Fine bubble aeration is an efficient technique of aeration in terms of oxygen transfer due to the large collective surface area of its bubbles.