Hi guys. I have been reading this thread & have since noticed the hassle & frustration you guys have been through... I was there myself. A senior here had given me some really good advices. Crystal Pro resin (normal or power) ones have since been giving problems. It is almost impossible to obtain 0 reading nowadays. My advice, shun this brand...... To effectively obtain 0 reading with much less hassle, try Madpetz resins. For those using crystal pro canisters, all you need is to buy empty containers and fill them up with Madpetz resins & charcoal. I can assure you guys 0 will be obtainable effortlessly. As for those who wanted a fair exchange of the crystal pro product, you may contact the direct supplier David-98270233 to seek replacement.
I hope my advice helps. Cheers.