Azurel
In Memoriam
Ironman,
Is the front of your tank lower in flow then the back 1/3 or 2/3? When this happened to me it was in the lowest flow areas, but slowly crept toward the higher flow areas. I didn't notice in time before it effected the majority of my substrate. Towards the end before I pulled it out I couldn't even break it apart, I was dosing Kalk at the same time this happened so I changed it out and scaled it back.
Is the front of your tank lower in flow then the back 1/3 or 2/3? When this happened to me it was in the lowest flow areas, but slowly crept toward the higher flow areas. I didn't notice in time before it effected the majority of my substrate. Towards the end before I pulled it out I couldn't even break it apart, I was dosing Kalk at the same time this happened so I changed it out and scaled it back.