HMS Double Arm Kit
530675
Great for mounting multiple lights on one rail across your tank.*Requires a HMS tank mounting rail to fit your tank, and HMS mounting brackets for each Hydra (sold separately). Adapts...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
Great for mounting multiple lights on one rail across your tank.
*Requires a HMS tank mounting rail to fit your tank, and HMS mounting brackets for each Hydra (sold separately).
Adapts to Your Tank
Tailor the HMS to your tank. Width, height, and even the angle of the light is able to be fine-tuned.
Slide & Swivel
Slide and swivel your lights to exactly where you want them, then fasten them in place to best illuminate your livestock.
Cable Management
The HMS features a slim profile with integrated cord management to minimize visual clutter and complement the clean look of your Hydra fixtures.
Specifications:
- Max Tank Thickness - 1.125"
- Max Height - 13"
- Max Outreach - 14.3"
- Vertical HMS Rails 15" (x2)
- Pivot Brackets (x2)
- Mounting Feet (x2)
*Light not included
Build around the HMS Double Arm Kit.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from accessories. Most buyers reading this page should buy the middle column.
HMS Rail
HMS Double Arm KitAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.