GHL Black Friday Deal #2: 20% off Doser Upgrades!

Nov 21, 2025

Matthias Gross

GHL Team

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Black Friday 2025 #2 Customer English.png

GHL Germany Store

GHL USA Store

Dear Customers,

Today our second Black Friday deal begins.

You're using a GHL Doser 2.x or Doser 2.x Maxi? Now is the perfect time to upgrade!

Sustainability Meets Innovation

GHL products are known for longevity, legendary robustness and operational reliability, and are designed not to be replaced after just a few years. Through regular software updates, accessories compatible for many years, and upgrade kits, you can keep your GHL devices up to date – without compromising on performance or features.

Your Upgrade Options

GHL Doser 3 Upgrade Kit (for Doser 2.x SA/EXT)

New front panel with modern Doser 3 pumps

Planetary gear peristaltic pumps for precise dosing

Keep your robust housing and proven electronics

GHL Doser 3 Maxi Upgrade Kit (for Doser 2.x Maxi SA/EXT)

New main board with latest technology

Quiet operation, Ethernet port, OTA updates

SA kit additionally includes new back panels and USB-C cable

Your powerful pumps and motors as well as the housing remain in use

Black Friday Special: 20% Discount

Promotion Period: Thursday, Nov 21 - Sunday, Nov 24, 2025
Discount: 20% on all three Doser Upgrade Kits

Take advantage of this opportunity and modernize your doser at our Black Friday special price!

Your GHL Team
GHL Germany Store

GHL USA Store

WHAT’S YOUR MOST MEMORABLE EXPERIENCE WITH A CORAL THAT LOOKED LIKE IT MIGHT NOT MAKE IT?

I’ve seen a dramatic comeback. I would have sworn it was a goner
Votes: 13 44.8%
A slow recovery, and it got back to looking healthy
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It came back some, but never looked as good as it used to
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I tried to save one, but it didn’t make it
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See, this is why I don’t keep corals
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Other (Post in the comments)
Votes: 2 6.9%