Mounting Your AquaIllumination Aquarium Lights: Options and Setup Guide
The Mounting Landscape for AquaIllumination Lights
AquaIllumination (AI) lights come with several mounting options, each designed for different tank sizes, light configurations, and preferences. Whether you want adjustability, a permanent installation, or something in between, there’s a solution that fits your setup.
HMS (Hydra Mounting System)
The HMS is the most versatile option for aquarists running Hydra series lights. It comes in single and multi-light configurations, both made from lightweight aluminum that won’t rust over time. The single mount works well for smaller tanks or targeted coverage, while the multi-light system shines when you’re running multiple fixtures.
With the multi-light HMS, you can adjust the height and angle of each light independently, and slide them side to side along the rails to minimize shadows and optimize coral coverage across your tank. The mounting feet accommodate both rimmed and rimless tanks, making it a flexible choice regardless of your tank type. If you prefer suspending your lights above the tank rather than mounting to the rim, the HMS hanging kit lets you attach the rails to ceiling or wall brackets for a cleaner aesthetic.
Prime Series Mounting Solutions
Prime lights have three main mounting approaches. The Prime Tank Mount bolts directly to your tank rim for a permanent, stable installation. The Prime Hanging Kit suspends the light above the tank, which many aquarists prefer for visual impact and easier tank access.
The Prime Flex Arm offers maximum positioning freedom. This gooseneck mount clamps securely to the tank rim with a grip that holds firm on rims up to 1.20 inches thick. It comes in 12-inch and 18-inch lengths, with a silicone-coated flexible portion that’s easy to reposition and move around as your tank layout changes. The design includes a set screw system that locks the arm in place once you’ve found the ideal angle and position. This makes the flex arm especially popular with aquarists who frequently adjust their lighting or want to target specific coral growth areas.
EXT Rail System
The EXT Rail system, an older approach still available, uses horizontal rails and brackets to suspend lights. EXT rails come in 6, 12, and 18-inch lengths and can be linked together to span wider tanks. The EXT Tank Mount lets you bolt the rail system directly to your stand, creating a sturdy, permanent installation that’s largely hidden below the tank rim. This appeals to aquarists who prioritize stability and a minimalist look.
Going the DIY Route
Beyond the official options, the aquarium community has explored creative DIY mounting solutions. Some build custom racks using 80/20 modular framing systems, which offer complete control over dimensions and positioning. Others 3D-print custom brackets tailored to their tank’s specific geometry and their light’s center of gravity. Tension rods, clamps, and creative use of PVC can also work for temporary or adjustable setups. The DIY approach requires more time and often some trial and error, but it delivers complete customization when standard options don’t quite fit your space or aesthetic.
How to Choose
Start by asking yourself a few practical questions:
- Single light or multiple? If you’re running one light, a flex arm or simple tank mount is often the most straightforward. For multiple lights, the HMS multi-light system gives you independent control and easy adjustability.
- Permanent or adjustable? Tank mounts and stand mounts are fixed once installed. Flex arms and HMS rails let you reposition easily as your coral grows or your layout changes.
- Space constraints? Flex arms take up minimal horizontal space. Rails require more footprint unless your tank is quite wide.
- Tank rim type? Most systems work on rimmed and rimless tanks, but flex arms spec out their maximum rim thickness—check that your tank qualifies.
- Aesthetics? Hanging kits create the cleanest look above the tank. Stand-mounted systems hide the brackets underneath.
Spending time choosing the right mount pays off. A solid mounting system keeps your light stable, lets you fine-tune coverage as your corals grow, and makes maintenance easier. Whether that’s an adjustable HMS setup, a positioned flex arm, or a custom DIY solution depends entirely on your tank and how you like to work.