The kits contain everything to get you started! Each kit contains the Apex computer, a pH probe and a temperature probe. The kits also contain the all new EB 632. With this Energy Bar you can control up to six 230v Outlets, two 24VDC accessory ports and three 1LINK ports (24VDC).The very complete Lab Grade kit also gives you a salinity probe and an ORP (Redox) probe. A succesfull aquarium starts with the Apex.