We researched different methods of filtering water such as carbon, sand, and fabric filters. In the end we decided on using the sand and fabric filters. This is the basis of the filter that we made.
After revising and using our research we came up with this sand filter. However, the pH was only at a 9-10 after filtering the water which would destroy the plants. We researched other ways to improve our filter.
After seeing the pH levels at 10, we researched substances that would absorb soap so that the pH would become more acidic. We discovered that felt would work. We put in felt every other layer. The pH then dropped to a 7, which is the pH of water.