Description
xHydor Koralia Evolution 850 GPH: Precision Circulation for Small Tanks
In small reef and freshwater aquariums, delivering steady, customizable water flow can be the difference between stagnant corners and vibrant, healthy movement. Hydor's Koralia Evolution 850 gph pump is designed to provide continuous, directed circulation with a compact, user-friendly footprint. The result is a reliable current that helps hobbyists recreate natural water movement, support filtration, and maintain even distribution of heat and nutrients without taking up excessive space.
What makes it stand out
- New vibration-absorbing magnet and suction cup support for stable mounting on glass up to 1/2" thick
- Shaft-less impeller delivers about 850 gph, optimized for tanks from 50 to 100 gallons, fresh or marine
- Power absorbed: 5 watts — 50% less power and up to 20% more flow than earlier Koralia models
- Sphere joint enables adjustable flow direction to target specific areas or corals
- Smaller design with cable protector; ideal for tanks with active inhabitants like urchins, puffers, triggers, and parrotfish
Easy integration and maintenance
The Evolution can be connected to Hydor's wavemaker system, expanding your control of water movement. For wavemaker use, pair with Koralia 12V controllable powerheads. The shaft-less impeller supports smoother operation and can simplify cleaning, helping you maintain consistent flow with less downtime.
- Low energy consumption, quick maintenance, and reliable performance
- Includes cable protector and a robust mounting system for secure placement
Ideal tank pairing and use cases
Designed for tanks in the 50–100 gallon range, it's well-suited for small reef or freshwater setups that host active species or corals requiring steady flow. In mixed communities, adjustable flow direction allows you to fine-tune circulation without major equipment changes.
FAQ
Q: What tank sizes is the Hydor Koralia Evolution 850 GPH suitable for?
A: Best for 50 to 100 gallon freshwater or marine setups, delivering adjustable circulation.
Q: Can I use this pump with a Hydor Wavemaker?
A: Yes, the Evolution 850 can connect to a Wavemaker; use Koralia 12V controllable powerheads.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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