A Hypostomus plecostomus could grow up to one foot or 50cm long though it is sold in aquarium shops mostly when it is still small. Its body is enclosed with bony or horny external plates. But its lower head and abdomen is naked. Breeding a Janitor Fish in a home aquarium would be difficult. The janitor fish have high fecundity and it lays 472 to 1238 mature male/female eggs. Its eggs are usually generated in stony areas or in dug holes in nearby banks and. The male Janitor Fishes that takes care of the eggs for 3-5 days. Each fish is expected to last for 10 – 15 years making it fast increasing specie estimated to double its population in about 1 – 4 years time. But there are many factors considered for the fish to thrive in a certain water system. First of all, just like any other fish, the Janitor Fish usually just goes with the flow and can be carried by flowing water. As what was stated in earlier paragraphs, janitor fish can exist not only in fresh waters but also in salty waters. Also, it best survives in waters with pH level of 6.5 – 7.5 and temperature of 23°C - 28°C. This specie hides underneath large rocks during daytime and is highly active at night time. Nonetheless, this creature can easily adapt with the environment in the aquarium setting during day time. Janitor fishes feeds on algae, aquatic weeds, small crustaceans and other aquatic creatures. More over, janitor fishes would easily adapt in an environment where there is food.