I am fairly confident that stuff is laboratory grade as well. It has the least amount of dust but it is a pain in large cages. All aspen once dirty can infect a boa, so cleaning the cage is the most important element, not the size of the chip. The small chips work fantastic in 8 to 32 quart size containers. Remember, these things crawl around in mud, gravel, etc... All these products mentioned work well.

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