Most setup advice skips the part that actually prevents problems: getting the foundation right before fish go in. This guide walks the breeding discus setup from empty glass to stable, livable water without the usual week-two crash.
What you need
- A 75-gallon tank and a stand rated for the weight (~300 kg when full).
- Filter rated for at least 300 L/h.
- Heater (if tropical): 115 W.
- Substrate: 3 cm deep.
- Live plants and a light on a 8-hour timer.
Common mistakes
Adding fish during the first week, skipping the cycle, and skipping water tests are the big three. A 35% water change weekly, using our Aquarium Net Maintenance guide, prevents most problems before they start.
Step by step
- Rinse substrate, add it, and hardscape before filling.
- Fill slowly to avoid clouding; start the filter and heater.
- Cycle the tank — see this Temperature Controller Guide piece — for 38 days until ammonia and nitrite read 0 ppm.
- Test water, then add a small group of hardy fish; build up slowly.
Spending smart
You can build a solid 75-gallon tank without premium gear: a reliable filter, a second-hand stand, and easy plants do most of the work. Spend on the heater and test kit, where cheaping out costs fish.
Next steps
Once stable, layer in more plants and a few peaceful tank mates. Keep a log of parameters; a tank you measure is a tank you can trust.
