Oxygen concentrations fall in warm weather... consider extra
aeration using airstones or venturi devices and other diffusion
Oxygen quite readily dissolves passively diffusing from the
atmosphere, but this limited amount is insufficient to satisfy the
demands of koi and other oxygen-loving pond organisms such as
beneficial bacteria and invertebrates in the filter.
Oxygen can often prove to be a limiting factor for fish and
biofilters with the health and performance of both benefiting from
additional aeration, especially during the warmer summer months.
- This can be achieved in a number of ways using water movement or the
injection of air.
- Besides ensuring an adequate exchange of gases, aeration is also
useful at helping to mix and circulate water within the pond,
reducing the presence of dead-spots.
- Working in a similar fashion to an aquarium pump, a pond air pump is
engineered to be able to pump larger volumes of air to greater
- This is desirable, as to be effective, air must be delivered to the
very bottom of a pond to provide the most efficient aeration and
- These are a cheaper alternative to the Hi-Blow, but will not serve
as many air stones or no where near the depths of those reached by
- These diaphragm air pumps are silent running, and will work
tirelessly for many years between diaphragm replacements.
- The air delivered by an air pump must be used efficiently by an air
diffuser, as this will significantly affect its oxygenating
- A venturi is an adapted piece of pipework which will draw air into a
stream of water as it is pumped into a pond from a filter chamber.
air pond pump water
aeration oxygen-loving bottom diffuser koi Hi-blow diaphragm venturi
"air dome" mixing depths click for full article
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