It may say it is a 65lb tumbler, but I am running 143lbs in it right now to have it at the correct level for Step I. I have pet wood and Banded Iron Formation nodules running together and that is what the weight of the barrel is when also filled to 3/4 full of water, large ceramic cylindrical media, and about 5-6 cups of 60/90 grit. Is 3/4 full the wrong amount of rock to run in this particular barrel?
You are correct to always fill the barrel 3/4 full of rock regardless of the weight. Diamond Pacific estimates the weight capacity as 90 lb. Thi is just a guideline. Always go by volume.
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