Komposisi plankton pada perairan  terutama pada tambak udang Vannamei dapat berperan sebagai parameter ekologi perairan selain sebagai  pakan alami dan penghasil oksigen. Sistem resirkulasi merupakan salah satu cara untuk menjaga kualitas air yang nantinya mampu mendukung komposisi plankton yang seimbang sehingga budidaya udang vannamei super intensif dapat berjalan optimal. Microbubble merupakan suatu alat yang berfungsi menghasilkan gelembung udara dalam air denga ukuran diameter kurang dari 200 µm. Gelembung mikro ini mampu meningkatkan kadar oksigen terlarut sehingga dapat menurunkan kadar ammonia dalam air budidaya sampai 95%. Penelitian yang dilakukan merupakan penilitian eksperimental yang dirancang dengan menggunakan dua kolam bundar dengan diameter 3 m. Satu kolam bundar menngunakan aerator dan yang lain menggunakan Microbubble untuk sistem aerasinya. Jenis Plankton diamati menggunakan mikroskop. Dari hasil penelitian tersebut Genus plankton yang mendominasi adalah Chlorophyta dengan nilai 88,%, Cyanophyta 8,%, dan Chrysophyta 2,7%. Jenis Chlorophyta meliputi Chlorella, Nanochloropsis, dan Oocystis. Penggunaan Microbubble mampu meningkatkan kelarutan oksigen, dari hasil penelitian nilai DO yang di dapat 5,05 mg/L. kelarutan oksigen yang tinggi di perairan memberikan dampak yang positif terhadap udang dan juga biota perairan yang lain.

The vannamei shrimp farming business still has the opportunity to continue to develop given the public's high demand and high national shrimp production target that must be met. Vannamei shrimp is also a commodity that has high economic value. However, vannamei shrimp cultivation is known as cultivation which requires the cultivators to have large capital making it difficult for all groups to reach. The purpose of this community service activity is to provide information and insight to the public regarding shrimp farming with technology that can be applied on a small scale with relatively low capital and is expected to be accessible to all people who wish to cultivate vannamei shrimp using a household scale cultivation system (Backyard Shrimp Farming/BSF). This service activity is in the form of online dissemination using the zoom application and broadcast live via YouTube of the Politeknik Kelautan dan Perikanan Sidoarjo. The activity was carried out by delivering material by the speaker and followed by a discussion and question and answer between the participants and the speaker. At the end of the activity, participants were given a link to fill out an assessment questionnaire related to the dissemination activities carried out. Based on the results of the questionnaire, it can be concluded that the participants had a great interest in this household-scale vannamei shrimp farming opportunity and felt the benefits of this dissemination activity, and overall the dissemination had been carried out well in terms of clarity of material delivery, the interaction between participants and the speaker, the suitability of the material and the performance of the moderator/facilitator in presenting the event.

Natural feed such as phytoplankton, contains high levels of protein, fat, and carbohydrates to enhance the growth performance and immunity in shrimp. Moreover, the presence of phytoplankton in the water column can make the waters shady so that it stimulates the shrimp to actively look for food during the day. Silicate is a macro element that used to promote the cell growth and cell wall formation of plankton. Ceraclean fertilizer product is an artificial hydrated calcium silicate with many small pores so that it is easily soluble in water to facilitate nutrient absorption by plankton cells. This study aims to determine the abundance of plankton in vaname shrimp culture ponds with the addition of ceraclean fertilizer and its correlation to the growth of vaname shrimp. This study uses a household-scale circular pond equipped with microbubble aerator technology with a power of 0.5 HP. The stocking density used was 700 fish/m3 and the maintenance period at DOC was 75. The average weight of shrimp growth at harvest was 9.8 grams with a total biomass of 273 Kg with an FCR of 1.1. A total of 262 ind/ml plankton were identified in household-scale aquaculture ponds with a percentage of Chlorophyta 57.20%, Cyanophyta 37%, Crysophyta 5%, Dinoflagellates 0.8% and Protozoa 0%. This study explains the low intake of feed used during the rearing period and the low FCR value because the shrimp utilizes natural feed. This also causes the growth of vaname shrimp in this study to continue to increase every week with an SR value of 90.1%.

Koi fish is one of the freshwater ornamental fish that has the potential to be developed and has important economic value. opening the market for koi fish seeds is quite high, so the availability of seeds must be available continuously. One way to produce seeds is by spawning. The main parameters observed in this study were fertilization rate, hatching rate and survival rate. The value of the fertilization rate in spawning 1 was 79 and spawning II was 80%. The hatching rate in spawning I was 73% and in spawning II was 87%. The survival rate for spawning 1 was 96% and spawning II was 79%.