Hi Rodeo, next time you have an issue just send me an email via the website. Quickest way of getting in contact with me. So since you are not using iCloud this is what you should do, connect your device to iTunes and backup the aquaPlanner data, you might also want to get the notifications file since it will be lost when you delete the app. More details on how to do this at aquaplanner - Aquarium Scheduler iCloud and Backup
Once you have those files, delete the app, reinstall the app. Make sure you have version 3.0.0. Before starting the app go back to iTunes and add the files back to aquaPlanner. You should now have your data back as well as notifications. I highly recommend you use iCloud by the way.