Water quality can change according to the availability, abundance, and composition of phytoplankton in these waters. The fertility of a waters can be reviewed by observing the phytoplankton community in it. The purpose of this study was to determine the effect of using different types of ponds, namely indoor and outdoor, on the diversity and abundance of phytoplankton and water quality. This research was carried out in six different ponds consisting of three indoor pools and three outdoor pools for 56 . Samples of phytoplankton in indoor and outdoor ponds were taken as many as 4 points each. The abundance of phytoplankton in indoor ponds ranged from 880-9482 ind/L while at outdoor ponds ranged from 506-3344 ind/L., which generally consist of 5 phyla, i.e. Bacillariophyta, Charophyta, Chlorophyta, Cyanobacteria, and Glaucophyta. The highest abundance of phytoplankton was found in the indoor pondl (A2) of 5979.60±3353.59 ind/L , while the lowest was in the outdoor pool (B3) of 1350.80±628.75 ind/L . Comparison of the abundance of phytoplankton in indoor and outdoor ponds showed significantly different results. Water quality measurements showed that the indoor was better than the outdoor ponds