Top of substrate "dirty" - suck out the dirt or mix it in?
My tank has been running just shy of three years and it is time for a rescape. I am taking all the plants and hardscape out of the tank and basically starting over. There is a bit of decomposing organic material on top of the eco complete in places and my question is, with everything out of the tank should I take this opportunity to stir that stuff into the substrate (good nutrients?) or should I just suck them off the top?