Does anyone have a method for cleaning the muck and dirt out of their pond? I just put this in last summer and I want to clean all of it out and my syphon doesn’t seem to lift the heavier stuff. You can see in the picture that the water is clean, just can’t seem to get the crap that is hanging out in the substrate. I was thinking a pump could provide the suction I need if I attach it to my syphon. Any help would be appreciated.