It’s recommended to test the parameters every few days—especially during the first days after introducing jellyfish—to ensure they remain within optimal ranges. Once the system stabilizes, measurements can be spaced out.
PH.
Acidity/Alkalinity 7,9-8,4
- If pH falls below this range, correct it by adding a marine buffer.
Salinity
Amount of dissolved salt in water. 30-35 ppm
- Recommended: 30–35 ppt This may vary slightly by species, but it's best to maintain salinity close to natural seawater.
- Measure weekly to account for evaporation.
- Never add salt directly to the aquarium. Always use pre-mixed artificial seawater prepared at least 24 hours in advance.
- Do not add distilled or RO water directly into the tank, as it may cause osmotic shock to jellyfish or damage the biological filter.
Alkalinity
Refers to dissolved carbonate salts. Helps maintain stable pH. Recommended: 8 dKH 8dkH
Temperature
Depends on the jellyfish species. Lower temperatures are generally safer to prevent tissue damage. 13-26ºC
- Measure weekly unless the environment has fluctuating temperatures.
- Consider installing a chiller or heater depending on your region and species.
- Avoid placing the tank near radiators or windows.
- Always check salinity and temperature before changing water. This helps match the new artificial seawater to tank conditions and prevents density shifts.
Weekly
- Salinity
- Temperature
- pH Measure
- NH₃ (ammonia)
Biweekly
- NO₂ (nitrites)
Monthly
- NO₃ (nitrates)
CASES
- If NH3>0 Do a water change, remove leftover food, add an ammonia blocker, reduce feeding, and retest.
- If NO2>0 Do a water change and reduce feeding.
- IfNO3>40ppm Water change required.
- If pH<7,8. Remove leftover food, add a pH buffer, optionally introduce live rock, or use an air pump in the external ring (never in direct contact with jellyfish) to stabilize pH.
Ideal Water Values
Substances dissolved in water produced by jellyfish waste or the decomposition of remaining food.- NH3=0
- NO2<0,05ppm
- NO3<20ppm
- PO4<2,0ppm