So I’m a bit late with this, but I’d like to wish everyone a happy new year and best wishes for 2020!
This coming May of this year, will mark 3 years I’ve been using HA to manage all my aquariums and home, and looking back at the number of times over those years and thinking about all the disasters alone that HA has saved my aquariums from, it is truly amazing. And then throw in all the extra time I have now reclaimed (think Automated Water Changes, remotely topping off the Sump with Salt Water when I’m in the next room vacuuming the sand in the display tanks, programming auto-dosers, etc.) - I become literally almost overwhelmed (in a good way) at what an excellent product Home Assistant really is.
And on that note, I’d like to especially thank all the fellow contributors who’ve joined the effort and shared their code, configuration files and build plans back into the project. I remain very appreciative of you and I can’t wait to see what we all can come up with in 2020.
And on that note - for those that aren’t following the thread about using Home Assistant as an aquarium doser (or hydroponics doser), check out @Twinsen68 brilliant contribution. He’s taken my original idea and created his own 4 channel reef dosing solution from scratch & is working on a calibration function. w00t! 
Cheers!