I had a big run on maple staircases. We import all our hardwood from Pennsylvania USA. We had quite a few spile holes in 10,000 board feet of brown maple. Not just the hole but the spile will stain the wood in a line above and below the hole dark.

In Quebec many are taping holes now who have over 10,000 taps. They use a product that is against the law to use but they are so big it is cost effective to pay the fine than stop using the product. If they don't start drilling now they will not get them all tapped.

Fine needs to be much bigger for them to stop. This is why it is best to make your own. In the process they get tested but just cut it with clean product to lower the part per million.

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7/8th of an acre, Perch only pond, Ontario, Canada.