He sees three problems with swimming in the Elbe:
- a powerful current (horizontal motion)
- tide (vertical motion)
- disease (such as Hepatitis A)
- The current can be reduced by the perforated screen, or if that doesn't work, by a series of baffles that slow the water.
- The part of the system in the water can be designed to float.
- In conjunction with the perforated screen, use the + Pool filter (see bottom of the webpage) to filter contaminants.