Update: I got my new sensor March 20. My conclusion of the conclusion is still valid...
I had to go back to the conclusion and see what your conclusion was. Cliff notes below:
@PurePleX Conclusion:
1. I've given up the idea of automated testing. It costs (moneywize, timewize, energywize, everythingwize) more than it gives and more compared to Hannas and ICP (even ME) once a week.
2. My tank doesn't need it! During this time something has happened to my tank - it's matured! Everything is thriving and growing, all parameters good and stable no matter what I throw on them - so (I'm sorry to say) scrap this forever and constant testing - I haven't graduated to SPS anyhow... And the day I do graduate to SPS I understand I will have the time doing Hannas as I'm going/have to stay with my tank constantly anyhow...
Edit: btw I noticed you mention ICP once a week. Do you really send them off at that frequency? That is expensive even if one uses FM's kits and buys them on sale (I've seen them as low as $13 USD.