I recently started using this product in my filtration. It seems to work great. I am wondering about its "regeneration" that Seachem states on the bottle. Does anyone regenerate his or her purigen and if so, what tips do you have when trying this? How many times have you tried this and does it change the effectiveness of the purigen? Any other tips or comment would be appreciated. So far I am very pleased with product, but as I said I have just recently started using it.