This brief article is an important one and should be read by anyone who’s putting a pond aerator into a large pond during the summer season. It’s in response to a fellow who called about a problem of losing fish after putting an aerator in his pond during some extremely hot weather.
This is an interesting and a bit of a trickly situation because good aeration is a very powerful tool for protecting fish during hot conditions, there’s no question about that. But at the same time, anytime you introduce something new into a pond’s environment, certain things can happen that may not always be desirable.
In the case of large ponds, and particularly those that have some age on them, it’s not uncommon to find some muck or sludge build up on the bottom. Some of this can be very nutrient rich and many times it’s made up of decomposing or rotting organic material. Leaves or dead plant matter are often the culprits.
During this decomposition process gasses can be created, and they may lie trapped in this sludge until something comes along and disturbs it. Nature can do this all on it’s own by creating an inversion in the pond, where the bottom and top sort of switch. This can be a very dangerous time for fish because it really messes things up in the pond. Dissolved oxygen levels can drop, toxic gasses can be released, and basically all of this is just not a good event in the life of a fish.
Read more