I have used mine for over a year now. For me, its worth its weight in gold just for the PO4 and No3 due to ease of use. Every now and then, I compare my results to my Red Sea pro kits just to make sure everyone is still within limits. The additional $4.99 cost for the 570 marine items for the app are a onetime charge.
The MOST important thing it to make sure is that you use up-to date reagents. When they go out of date, THEY WILL not read correct so don't blast the unit if you cheap out and try to stretch them past use date. I have my main unit and a backup and won't ever have a marine tank with out them . I sold two extra units to fellow members and from what I see, they are also happy with theirs.
I buy Reagent directly from the manufacturer site that way I have the freshest possible. Tim in support is amazing and will help you with any question. However, they don't have tons of techs so do you due diligence and read the manual and instructions for your specific test before you send a simple silly question. If anyone has any questions or a problem, I may be able to help you thru.
The MOST important thing it to make sure is that you use up-to date reagents. When they go out of date, THEY WILL not read correct so don't blast the unit if you cheap out and try to stretch them past use date. I have my main unit and a backup and won't ever have a marine tank with out them . I sold two extra units to fellow members and from what I see, they are also happy with theirs.
I buy Reagent directly from the manufacturer site that way I have the freshest possible. Tim in support is amazing and will help you with any question. However, they don't have tons of techs so do you due diligence and read the manual and instructions for your specific test before you send a simple silly question. If anyone has any questions or a problem, I may be able to help you thru.