[Jules]

Steve I do not feel it can be comapred to the showers as it is a different method of filtration all together. The reason the Matting was changed was it colledted too much muck and was hard if not impossible to clean. Also Daisuke found that some of the koi were getting Hikui. This has stopped now the matting has gone and BHM used, words from Daisuke not mine.

The one advantage of the submerged is with the air line diffusers 12-18 inches below the trays of media it has time disperse and not erode the media and it is easy to clean by throwing in a submerged pump to the next chamber and hosing it down in a slow othadox manner. When I cleaned the systems over there Daisuke made me go back over the medai at a slightly quicker pace to check if all the media was clean.

The submerged media is used on the 500 ton and 1500 ton ponds as these all had Japanese Matting before as a submerged media. None of the other new sytems is any where near this gallonage so no need for submerged media.

Jules