I keep a Diary of just about everything on my Aquarium. Including purchases, Dry and Live Goods, my Dosing and Feeding Times, except for the Auto Feeding. Reminders for Scheduling Maintenanc. I used to keep a written Diary, but it was a bit cumbersome, and hard to go back and research. Now I use the CalenGoo App. the search engine is excellent, and it easily updates from device to device. IE iPhone to iPad to a Microsoft computer and back. If I want to see when I got my Lime Green Psammocora, and what progress it has made I can enter Psammocora and the list pops up. Like the time it got accidentally fragged. When setting CalenGoo up set up a Google Account first on a Computer then get the App. I would look at the set up procedures on your hand held device, while installing on your computer. I goofed on the original set up and lost a couple weeks, but haven’t lost a single entry or Calendar since. Yes, you can set up multiple color coded calendar. Sample of the search engine.