I have a number of coal loader accessories on my layout and can't figure out what artificial coal works best. Right now I am using black aquarium gravel that's inexpensive looks good and seems to work OK but I am looking for a better option. The MTH coaling tower seems to have trouble picking up the gravel so is the problem my choice of artificial coal or the accessory itself.? What the best artificial coal to use and where can it be purchased? Comments appreciated.
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