Seahorse Tauchbasis Kronau is a dive center located next to the Althäuser See. They offer amenities such as parking, a terrace with a lounge, changing rooms, and equipment rinsing facilities. The center welcomes divers, clubs, and schools, and provides various entry and exit points for the lake. They are open on weekends during the diving season.
Winter break from November 1st to April 10th, but can open for groups larger than 10 by arrangement.