The first month of a guppy tank is where most problems are created — or avoided. Many beginner issues aren’t caused by “bad fish.” They’re caused by a tank that hasn’t settled: fluctuating parameters, inconsistent feeding, and big clean-ups that interrupt developing biology. A simple first-month plan keeps everything predictable: small changes, regular testing, and gentle stocking. If you follow a calm checklist, your tank becomes stable and guppies become easy to keep.
Week 1: stability and observation
- confirm heater/temperature stability
- keep lighting moderate (avoid long photoperiods)
- test ammonia and nitrite regularly
Week 2: gentle routine
- small consistent water changes
- feed lightly; remove obvious leftovers
- observe behaviour for signs of stress
Week 3: adjust based on numbers
If nitrates rise quickly, reduce feeding and increase steady water changes. If ammonia/nitrite appear, respond with dilution and avoid overcleaning the filter.
Week 4: settle into your long-term schedule
- choose a weekly maintenance routine you can sustain
- avoid major rescapes or “deep cleans”
- stock slowly if adding more fish
The first month is about creating a stable baseline. Once you have that, guppies reward you with colour, activity, and predictable behaviour. Stability isn’t boring — it’s what makes guppy keeping enjoyable.
