[mmattia]

Thank you for your feedback. I am only using the test kit as a first line of testing. I will not be selling products that have not been professionally tested. The test kit is just my way of knowing which preservatives absolutely do not work before I spend hundreds at a lab. 

[mmattia]

Thank you very much for your response. 

Do you have any recommendations for effective natural broad spectrum preservatives I can replace the phytocide with?

In the future, if I were to test another product/preservative system, how long should I leave the vial before knowing if my preservative was effective or not? How can I be confident my preservative is definitely working?

Also, I definitely agree that a professional PET will be my next step - I just figured that the at-home tests would be a good start so that I can send my products in after they pass the at-home test and save money on the ones that definitely won’t pass. Do you have any recommendations on labs that do PET testing in the US?

Thank you