I ordered both the Phosphate and PH test kits separately. The phosphate kit arrived first, but unfortunately, the tube broke. I waited a few days for the PH kit to arrive and used that tube to run the tests. In the meantime, I emailed API. They responded the very same day. I just needed to send them the lot on the box and they wrote to say they would send a replacement tube. Well, they sent 4 tubes that arrived today. I see a lot of people complaining about the tubes, but tubes break. The company is very responsive and takes responsibility. What more could you ask for. I'll be springing for the master test kit in the near future.
Rating:
[5 of 5 Stars!]