Have you tried The Original Mulch Block made of coir? I have been spreading for months and am pleased to see, so far, it has retained it's color. I really love chocolate hull mulch, but with it came my only experience with fungus gnats. Not wanting to go through that EVER again, can you tell me if coir can cause the same problem or if because it can't 'crust over', not to worry? Is coir less prone to fire than redwood or cedar? Do they loose moisture at the same or different rates?