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AquariumTested topic
Heat, light & flow
Heaters and controllers, chillers, planted and reef LED lighting, pumps and wavemakers.
HeatersHeaters and controllersLightingPlanted and reef LEDs
Pumps & flowReturns and wavemakers
ChillersCooling warm tanks
Heat, light & flow
Heaters
ComparisonAquarium Heater Controller vs Built-In Thermostat
Compare a heater’s built-in thermostat with an external aquarium temperature controller by probe placement, control, setup, alarms and equipment compatibility.
Buying guideAquarium Heater Size Guide
Size an aquarium heater: watts per gallon by room temperature, one heater vs two, external controllers, placement, guards and how to avoid overheating.
Heat, light & flow
Lighting
Buying guidePlanted Aquarium Lighting
Choose planted aquarium lights: PAR for low, medium and high-light plants, spectrum, depth, dimming and photoperiod, balanced with CO2 to limit algae.
ComparisonRGB vs Full-Spectrum Aquarium Lighting
Compare RGB and plant-focused full-spectrum aquarium lights by color control, plant needs, PAR at substrate depth, scheduling and fixture coverage.