Chiller Size Calculator

Chiller Size Calculator

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Size Your Aquarium Chiller

Enter your tank volume and we'll recommend a Teco chiller sized to hold it – based on each model's own rated volume.

litres
Enter your tank volume above
We'll recommend a chiller size.

Based on Teco's own rated volumes: TK150 to 150L, R290 TK500 to 500L, TK1000 to 1000L, TK2000 to 2000L. Ratings assume water at 25°C in a 30°C room with standard lighting – size up if your room runs hotter or your lighting load is heavy.

Rule of thumb: Teco's rated volumes assume a specific test condition – water held at 25°C in a 30°C room, with a heat load of roughly 0.3–0.5 watts per litre from lighting and pumps. A hotter room, a sunnier spot in the house, or a heavy lighting rig will all reduce how much volume the same unit can actually hold at temperature. If your tank sits right on the boundary between two sizes, or your room regularly tops 30°C over summer, size up rather than run a unit at its ceiling.

FAQ

How do I choose the right chiller size?

Enter your tank volume above – it's matched against Teco's own rated volumes for each model. If you're right on the boundary between two sizes, or your tank runs a heavy lighting rig, size up.

What does "rated to 500L" actually assume?

Teco tests each model against one published condition: water at 25°C in a 30°C room, with a heat load of about 0.3–0.5 watts per litre from lighting and pumps. It's not a guarantee across every room and every lighting setup – a hotter room or heavier lighting load will reduce the volume the same unit can hold at temperature.

Do I need a dedicated pump to run a chiller?

Yes, or spare capacity on your existing return pump. Each model has its own minimum flow rate – 400L/h for the TK150 and TK500, 500L/h for the TK1000, 600L/h for the TK2000 – check your pump can supply it before buying.

My tank is bigger than the TK2000's rating – what do I do?

Ask our team in-store. Systems over 2000L (or display-plus-sump totals that add up to that) generally need either a larger commercial unit or multiple chillers plumbed together, and that's worth a conversation about your specific setup rather than a generic answer here.

Shop Teco Chillers

Rated volumes above are Teco's own published figures. Running a heavy lighting rig or a hot room? Size up, or ask our team in-store.