not suitable for water wall

Have the funds for my Waterwall bought to spare me the constant use of distilled water. When my water wall, the water flows to about 15cm width over a distance of approximately 1.20m almost vertically down. Here, the water spread over the whole width of 15cm.

After adding the agent to the water but pulls together to a single stream that runs down the middle on the water wall at about 2cm wide. The agent causes apparently, that the surface tension of the water increases greatly, the water no longer distributed over a large area.

Too bad, much hope was placed in the middle.