Tourist attraction in Lake Limboto located in District Limboto, Gorontalo District, which currently has a depth of between 5 to 8 meters, the end or the tourists can enjoy various activities, among others, fishing, boating competitions, or swim. In addition, they also can enjoy fresh grilled fish supplied by local fishermen society with a relatively cheap price. Lake Limboto from year to year, large and deep levels continue to decrease. Size Limboto Lake in 1999 ranged between 1900-3000 ha, with a depth of 2-4 meters (Branch Gorontalo District Fisheries Office, 2000). In 1932, these waters reach the area 7000 ha, with a maximum depth of 30 m (Sarnita, 1996). Thus, there has been a fairly rapid pendangkalan in these waters that reached 38.80 cm / year. Deforestation in the surrounding waters appears to be one of the factors causing tinggi.Data enough pendangkalan water quality during 1998-1999 shows that the lake surface water temperatures during the day Limboto between 29-32,50 o C, while the brightness ( "transparency ") 35-65 cm. By day, the amount of oxygen in the water surface and in layer 1 meter below the surface, respectively 6-10,30 mg / l and 4-7,10 mg / l. Content of CO 2 in the surface layer ranged from 0-5 mg / l, pH and total 8,30-8,80 waters alkalinitasnya ( "alkalinity") 55-85 mg CaCO3 / l. Phosphate compound levels ranged between 0,02-0,07 mg / l, was nitratnya content is very small (close to 0 mg / l), but levels nitritnya reach 0,30-0,90 mg / l, and levels of organic materials 30 -- 37 mg / l. Based on the content of phosphate, according to the classification of Parma (1980), Lake Limboto including mesotrof waters.