The column that had only paper started out mostly clear, then it started to turn orange, and as time passed the water started to turn dark orange.
The water in the paper and yolk column also started out mostly clear, turned orange, and then it went more towards a grey color. It also started to grow some algae at the top.
Like the water in the P column and the P+Y column, the water in the paper, yolk, and shell column started out mostly clear, but then it started to get blacker and darker as time went on. It also started to grow algae on the dirt layer.
The water in the unenriched column started out dirtier than the other columns, and it got a lot darker as time went on. Either some sort of black plant was living in the column, or a lot of the organisms died, causing the water to darken.
Going from left to right, the images in the pictures were taken on: Dec 20, 2012, Feb 18, 2013, April 10, 2013, and May 5, 2013.
