Temperature Control
Keep your tank at the perfect temperature
Whether you're keeping tropical reef fish at 26°C or a species-only coldwater tank,
precise temperature management is the single most important factor in livestock health.
From entry-level heaters to multi-fan cooling systems, we have the full solution.
Too cold
Below 24°C triggers stress, immune suppression and metabolic slowdown in tropical marine fish. Heaters are essential year-round in the UK.
Ideal range
Most tropical marine and freshwater species thrive between 24–27°C. Stability matters as much as the number - swings of even 2°C cause stress.
Too warm
Above 28°C depletes dissolved oxygen and stresses corals. Summer room temperatures can push tanks over safe limits — fans and chillers prevent this.
Aquarium Cooling Fans
Evaporative cooling fans clip to the rim and reduce water temperature by 2–4°C through evaporation - the most cost-effective summer cooling solution.
Pair with the Thermostat Controller for fully automatic temperature management.
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Quick sizing guide — which cooling fan do I need?
Match your tank volume to the right fan configuration for effective evaporative cooling.
Up to 50L
1 x Fan
Nano & small tanks
50–100L
2 x Fans
Small display tanks
100–200L
3 x Fans
Mid-size reef & tropical
200L+
5 x Fans
Large display systems
Any size
+ Thermostat Controller
Fully automatic control
Tip: For open-top reef tanks, always pair your fan(s) with the Thermostat Controller for automatic on/off temperature management. Fans reduce water temperature by 2–4°C through evaporation.
TMC Therm Heaters
The Therm range is TMC's own-brand submersible heater line - reliable, accurate to ±0.5°C and built to last.
Choose wattage based on tank volume. The H2Therm is a micro heater designed for nano and small systems.
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Quick sizing guide — which heater wattage do I need?
Up to 30L
H2Therm 10w
Nano / refugium
30–60L
Therm 50w
Small display
60–150L
Therm 100w
Mid-size
150–300L
Therm 200w
Large display
300L+
Therm 300w
Large system
Heat Retainers
The Next Wave Reef Guard Heat Retainer is a top-notch aquarium cover designed to maintain optimal temperature conditions for your aquatic life.
Specifically engineered for reef aquariums, this product requires a reef guard for mounting.
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