Aquarium cycling calculator for discus
Not sure if your tank is ready for discus? Enter your measured ammonia, nitrite and nitrate values, and the calculator tells you which stage of the nitrogen cycle you're in and whether it's safe to add fish.
Aquarium cycling calculator
Find out which nitrogen cycle stage you're in and when you can add discus
Enter your measured values to find out the cycle stage.
Indicative only. A full cycle usually takes 3–6 weeks. Don't add discus until ammonia and nitrite stay at 0 and nitrate appears.
Learn more
Frequently asked questions
Create your tank in “My Aquarium” and your parameters, volume and tasks stay saved. You also get free email reminders.
Other useful calculators
For cycling
Test kits, starter bacteria and filter media for a healthy cycle
Water Hardness Test Kit, Sera gH Test, 15ml
Permanent Test for Monitoring Ammonia and pH Levels, Seachem Alert Combo pH-Ammonia (6 months)
Nitrate Level Monitoring Test, Sera Nitrat NO3, 3x15ml
Permanent pH Test, Seachem pH Alert
Permanent Test for Measuring Ammonia and pH Levels in Water, Seachem Alert Combo Ph-Ammonia (1 Year)
pH Tester, Hanna Checker Plus Tester pH with 0.01 pH Resolution, Replaceable Electrode
Oase AquaActiv QuickSticks 6in1 Water Test Strips
Oase AquaActiv Professional Water Testing Set
Catappa Leaves, Sera Catappa Leaves - M
Bacteria Culture Additive, Seachem Stability, 1 L