For the first time I added 'great white' to my resevoir. After one week I went to change the water and was shocked to find this strange light brown sludge all over everything.

This is the only thing I've changed in the last week so I'm hoping that I'm looking at massive colonies of beneficial bacteria.

Has anyone seen this before?

Thanks

P.S. The plants seem happy and are growing well so I'm not worried about them too much.
TerraPharma Reviewed by TerraPharma on . Is this from using 'Great white' For the first time I added 'great white' to my resevoir. After one week I went to change the water and was shocked to find this strange light brown sludge all over everything. This is the only thing I've changed in the last week so I'm hoping that I'm looking at massive colonies of beneficial bacteria. Has anyone seen this before? Thanks P.S. The plants seem happy and are growing well so I'm not worried about them too much. Rating: 5