Good setups for a 75 gallon tank

Community setup

Three or four schools plus centrepiece and cleanup crew. Fifteen to twenty tetras, twelve to fifteen rasboras or barbs, twelve corydoras, a pair of dwarf gouramis or a single angelfish, and a bristlenose pleco. Or add rainbowfish if your water is hard. Canister filtration recommended. Plenty of structure and plants. Track water parameters and bioload — tools like App-aquatic help you stay on top of maintenance.

Centerpiece setup

Three or four angelfish, twenty to twenty-five tetras (rummynose, cardinal, or black neon), twelve corys, and a bristlenose. Tall tanks suit angels. Alternatively: a pair of pearl gouramis with two schools and a pleco. Provide vertical space and hiding spots.

Cichlid setup

75 gallons works well for African or South American cichlids. Malawi mbuna: a group of six to eight compatible species with plenty of rockwork. Tanganyika: shell dwellers or a small group of frontosa. South American: Severums, keyholes, or a pair of larger species with dithers. See types of cichlids. Match water chemistry; overstocking can reduce aggression in some African setups.

General tips

Cycle thoroughly. Add fish in groups. Strong filtration and weekly water changes. Research species compatibility before mixing.

Quick takeaways

• 75 gallons suits large communities, multiple centrepieces, or cichlid projects.
• Match species to water hardness; provide structure for territorial fish.
• Cycle first, stock gradually, maintain regularly.