They can be divided into aerobes and anaerobes. Bacteria can be aerobes or anaerobes. They are aerobes as well as anaerobes and aerotolerant bacteria. CHG is active against Gram-positive and Gram-negative organisms, facultative anaerobes, aerobes, and yeasts. These short chain fatty acids inhibit phagocytosis of aerobes. All species are aerobes found in water. The "Xanthomonadales" are gram-negative, catalase positive, non-spore forming obligate aerobes. Also, almost all algae are obligate aerobes. Thus aerobes grow, proliferate and destroy more tissues. The family includes strict aerobes, strict anaerobes, and nitrogen-fixing (diazotrophic) members. Compost is produced by aerobic digestion-decomposition by aerobes. All species and strains of "Pseudomonas" have historically been classified as strict aerobes. This allows the differentiation of obligate aerobes, obligate anaerobes, facultative anaerobes, microaerophiles, and aerotolerant organisms. The majority of Acidobacteria are considered aerobes. Like other members of the genus, all three are aerobes capable of producing endospores.