Pro Shrimp

Aquael Flow In-Line Heater

Aquael Flow In-Line Heater - Main image
$37.46 $49.95 In stock

Category: Aquarium Heater

Aquael Flow Heater 2.0

Transform Your Aquarium Experience
The Aquael Flow Heater 2.0 introduces an elegant and efficient way to maintain perfect water temperature—without cluttering your tank. Designed as an external inline heater, it mounts onto your external filter hose, freeing up valuable aquarium real estate while ensuring even heat distribution.

Key Features

  • Smart Heating System (SHS): Adaptive technology that modulates power output based on aquarium size and prevailing conditions. Enjoy smoother, stress-free heating and improved energy efficiency.
  • Precision Temperature Control: Built-in electronic thermostat delivers stable temperatures with ±0.5 °C accuracy across a range of 20–33 °C
  • One-Touch & LED Display: Use the intuitive One-Touch system to set your target temperature. A bright LED panel displays both the set and actual water temperatures for easy monitoring.
  • Safety Assured: Equipped with multiple sensors (2 electronic + 1 thermal fuse) to safeguard against dry-running or overheating. The heater automatically shuts off if water flow stops.
  • Installation & Aesthetics: External placement keeps the interior of your tank clean and open, while the layout enables seamless integration into your aquascape.
  • Versatile & Universal: Available in two models—300 W for aquariums up to ~600 L and 500 W for tanks up to ~1,000 L. Compatible with standard filter hoses (16/22 mm and 19/25 mm). Suitable for both freshwater and marine environments.
Feature 300 W Model 500 W Model
Aquarium Size 100–600 L 300–1,000 L
Power 300 W 500 W
Temperature Range 20–33 °C 20–33 °C
Accuracy ±0.5 °C ±0.5 °C
Hose Size 16/22 mm, 19/25mm 16/22 mm
Dimensions 12.6 × 8.6 × 33.3 cm 12.6 × 8.6 × 33.3 cm
Installation Inline (external) Inline (external)
Confirm the order

Check the specification, quantity and total at checkout.

Before work begins

Factor in processing and transit time when planning your order.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
Refund requests

Use your order reference when explaining the issue to the store.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery for your items

Check the destination and shipping charge before payment.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Sending an item back

Ask the store for instructions before packing and returning the item.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.5 / 5 · 4 reviews)

Harper G. ★★★★★

I was tired of bulky heaters cluttering my tank, but this in-line unit sits neatly in the filter hose and heats evenly. Installation was straightforward, and my fish seem much calmer now. It’s a clean, efficient upgrade.

Lucy Y. ★★★★★

Finally, a heater that doesn't take up space inside the tank—the inline design is so much cleaner. I can see the temperature setting clearly on the external display, and the water has stayed perfectly stable since installation.

Michael ★★★★☆

The in-line design keeps my tank looking clean, and the temperature control is precise once I dialed it in. Installation took a bit of work with my existing canister filter, but it's worth it for the hidden look.