Core system
- Tank and structurally suitable cabinet / stand
- Reef-capable light with mounting hardware
- Return or circulation pump
- Additional in-display flow if required
- Appropriately controlled heater; backup plan considered
- Filtration media and model-compatible holders
- Protein skimmer only if the chosen plan calls for one
Water preparation
- RODI unit or reliable source-water plan
- Food-safe storage and mixing containers
- Dedicated mixing pump and heater if needed
- Refractometer or other salinity instrument
- Calibration solution appropriate to the instrument
- Salt mix and a repeatable measuring method
Measurement and maintenance
- Test equipment chosen for the parameters you will actually track
- Thermometer independent of the heater dial
- Algae scraper and aquarium-only cleaning tools
- Siphon / hose, towels and spill plan
- Replacement mechanical media and consumables
- Maintenance log or calendar
Electrical and contingency
- Drip loops and sockets kept away from splash paths
- Suitable RCD protection and safely rated power distribution
- Cable labels and dry equipment mounting
- Spare or emergency heater appropriate to the system
- Plan for power cuts and circulation interruption
- Model numbers, receipts and warranty terms saved
Compatibility checks people miss
- Will the skimmer, ATO sensor and media basket fit the actual chamber and operating water depth?
- Can the largest device leave the cabinet without dismantling plumbing?
- Does the return pump still deliver useful flow at the system’s vertical head height?
- Are plug type, voltage, warranty route and replacement parts suitable for the UK?
- Does the cabinet safely carry the filled system on the intended floor?
Turn the list into numbers
Use the setup budget calculator to price each group, the electricity calculator for running cost, and the tank-kit comparison to see what three current systems include.