By the lake or the seaside, these machines are not used to pump out prawns or lobster or crawfish. Nor were these devices ever designed for such purposes. If it has not been declared illegal in your area, you need a special permit to go fishing for such crustaceans. By now, you know why. Entire species are all critically endangered or at risk, depending on where you are located. Fishing practices, as a matter of law or moral principle, if it takes place at all, needs to be as sustainable as possible.
This to give all threatened species a chance to revive. But in view of high pollution levels of the sea, lakes and dams, this remains a challenge. Another necessary sustainable practice being carried out is that of aerating land-locked lakes and dredging shallow water levels. Those of you interested in making a positive contribution towards cleaning up your lakes need to know that specifically designed and manufactured aeration pumps for lakes are available for distribution.
But it is recommended that you bypass this exercise. Not entirely, mind you. It is recommended that you leave it up to the professional technicians to do the dredging and aerating work, as required. Apart from the fact that these folks will already be quite comfortable with the use of their pumps and dredgers, they also have professional marine expertise with its special focus on drastically reducing pollution levels.
But of course, if you are game enough for this work, you can learn. And of course, these same professionals will be teaching you how. Further, your pumps or dredgers are easy to maintain and clean. Needless to say, and stating the obvious, given its purpose, regular cleaning of these devices would always be required.