The UNS Stem Plant Holding System 90 - Triple Decker is a sleek, high-capacity setup designed for easy organization, effortless maintenance, and optimal plant growth. Whether you're a serious hobbyist, a collector, or looking to streamline your plant care, this system can hold up to 279 potted aquarium plants. The compact design allows you to efficiently stock, grow, and showcase hundreds of aquatic plants in a neatly organized setup.
Featuring 3 stacked shallow all-in-one tanks, this system allows for easy access and unrestricted plant growth, all housed in a durable aluminum stand that saves space without compromising stability. Each tank has its own filtration system and adjustable flow control, so you can tailor water circulation to your plants' needs. The included potted plant trays let you arrange plants in customizable tiers, ensuring taller stems get the support they need while keeping everything neat and accessible.
Maintenance is a breeze thanks to the centralized plumbing system, allowing you to perform water changes across all three tanks at once. With adjustable water flow, you can direct circulation to the surface or beneath the trays, keeping plants healthy while flushing out debris with minimal effort. Plus, the system supports inline CO2 injection, ensuring optimal plant growth while keeping your setup clean and organized.
Whether you're managing an aquascaping project, cultivating a personal aquatic plant nursery, or simply looking for a functional display, the UNS Triple Decker Holding System delivers a professional, high-capacity solution. Its versatile design seamlessly integrates into any setup.

Key Features
- Durable Aluminum Cabinet – Built to last with a sleek, modern design.
- High Capacity – Holds up to 279 standard 2" pots, maximizing plant storage.
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Streamlined Water Changes –
- Interconnected plumbing allows for simultaneous water changes on all three tanks.
- Drain and return pipes neatly clamp to the side of the stand.
- Pre-installed hose barbs connect to standard hoses and drainage lines for a hassle-free experience.
- Independent Filtration & Plumbing – Each tank operates with its own separate filtration system for optimal water quality. Includes an acrylic baffle tray for filter floss, making waste removal quick and easy.
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Two Flow Options for Maximum Efficiency:
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1. STANDARD Flow:
- Water flows through filter floss into the back chamber before being returned to the same tank.
- Adjustable flow direction via top duckbill nozzle or bottom spray bar.
- Right ball valve allows precise control of flow between the two outflow nozzles.
- The spray bar helps push debris into the filtration chamber, ensuring a cleaner tank.
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2. FLUSH Option:
- Uses the same pump but reverses the water flow via a three-way ball valve.
- The left spray bar directs debris into the bulkhead drain on the right for quick cleaning.
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1. STANDARD Flow:
- Simplified Plumbing System – The 3-way valve prevents over-complication and protects the pump from potential damage.
- CO2 Integration – Easily add an in-line CO2 diffuser into the soft tubing for optimal CO2 dispersion.
- Adjustable Plant Trays – Included trays are height-adjustable for flexible plant arrangement.
- Pump Compatibility – Pumps NOT included; recommended models: Sicce Syncra 4.0 or 5.0 per tank.

What's Included
- 3x Holding Tanks - 35.43 x 22.04 x 14.17" / 90CM each
- 12x Plant Holding Trays - Holds up to 279 standard 2" pots total
- Stem Plant Holding System Display Cabinet - Triple Decker
- Installation instructions and tools for assembly
Product Specifications
- Stand Dimensions: 37.80 x 22.05 x 84.65" / 96 x 56 x 215CM
- Individual Tank Dimensions: 35.43 x 22.04 x 14.17" / 90 x 56 x 36CM
Overall rating: 4.0 / 5 from 1 reviews.
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I was impressed with the
"I was impressed with the build quality, clear glass, and neat seams on the tanks. The setup process was quick and easy, and the delivery was fast as well. However, there are a few downsides. There are no adjustable feet to level the system, no light mounting brackets, and no pump included. The protective film on the plastic parts and the filter tray is extremely hard to remove. I also noticed that when the lights are on, a bacterial film forms on the filter floss due to exposure to light — a cover for that section would help. Additionally, one of the drain pipes had chipped threads, as if the end was trimmed with pliers. Finally, the delivery time was not confirmed in advance, and I had to pay extra for scheduling. Overall, the system is great, but it could use some small improvements."
Q&A
- How do I set up the plumbing on the three tier set up? Is there any instructions?
- Hi Reid, UNS has an installation guide for the plumbing. It can be found here: https://youtu.be/VPiQ_6azYSo?si=IEq0lSn_PxnVSwQg Best regards, Team Buce Plant