Tambahkan air asin ke dalam akuarium. Pasang pompa udara dan lampu LED lalu nyalakan. Lakukan tes untuk mengetahui kadar amonia, nitrit dan nitrat.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Jellyfish are salt water animals so you will need to use salt water only in the tank. You can make your own salt water using marine salt or buy pre-mixed salt water at your local pet store. Do not use sea salt or salt for consumption!  To make salt water for your tank, you can use aquarium salt or ionic salt. You should dissolve the salt crystals in reverse-osmosis filtered water or distilled water, making sure there are no big chunks of salt in the water. Do not use tap water as it contains ele