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UNS Controsand - Kona

Original price $ 29.99 - Original price $ 49.99
Original price
$ 29.99
$ 29.99 - $ 49.99
Current price $ 29.99
Size: 3L

Product Overview

Ultum Nature Systems Controsand offers a versatile lineup of natural decorative sands and gravels designed to give any planted tank or freshwater aquarium a finished, professional look. Kona is a rounded pebble aquarium gravel featuring deeper earthy tones that bring rich, natural contrast to riverbed displays or tumbled paths. Its smooth granule texture provides a safe, comfortable foraging ground for Corydoras, dwarf shrimp, and other bottom dwellers without harsh or sharp edges. Measuring between 3mm and 5mm, this versatile substrate works beautifully on its own, blended with finer cosmetic sand, or placed along transition zones for extra visual depth.

This item qualifies for FREE shipping to the contiguous U.S. Shipping to Alaska or Hawaii? Contact us for a custom shipping quote—we’re here to help!

Key Features & Benefits

  • Smooth, rounded pebble composition protects sensitive barbels, dwarf shrimp, and bottom-dwelling species during foraging.
  • Rich, deep color palette creates natural visual contrast against lighter stones, driftwood, and vibrant aquatic plants.
  • Natural decorative geological composition designed for aquarium, paludarium, and other terrestrial use.
  • Versatile 3mm to 5mm granule sizing blends effortlessly with other cosmetic substrates to create custom riverbed textures.

Usage & Application Guidelines

  • Rinse the gravel gently with clean tap water before installation to clear fine dust particles from transit.
  • Distribute the granules evenly across foreground areas, hardscape borders, or dedicated accent zones.
  • Pour water gently over a plate or plastic barrier during filling to avoid disturbing your hardscape arrangement.
  • Pair with root tabs or layer over aquarium soil when planting heavy root-feeding species in pebble gravel zones.

Quick Facts & Specifications

Listed information should be treated as general guidelines only. Team Buce Plant encourages you to do thorough research to ensure healthy growth!

Granule Size Comparison

Attribute Specification
Granule Size Rounded Pebble Gravel (3.0–5.0 mm)
Ideal Applications & Plants Riverbed biotopes, hardscape accenting, bottom-dweller tanks & contrast pathways
Key Advantage Smooth edges protect bottom-dwellers; deep natural tones highlight surrounding hardscape

Substrate Volume & Tank Sizing Guide

Bag Size Recommended Tank Setup Estimated Bed Coverage
3 Liters ~9 Gallons / 34 Liters (e.g., UNS 45U Standard Tank) ~1 to 1.5 inch accent depth
8 Liters ~20 Gallons / 75 Liters (e.g., UNS 60U Standard Tank) ~1.5 to 2 inch full bed coverage

Frequently Asked Questions

1. Do I need to rinse this aquarium substrate before adding it to my tank?

Yes, giving Controsand Kona a quick rinse in clean tap water before placing it in your aquarium is recommended to remove loose dust from transit and ensure immediate water clarity.

2. How much substrate do I need for my aquarium size?

For foreground pathways or focal accenting, a single 3-liter bag covers most tanks up to 9 gallons. For full bed coverage or larger setups up to 20 gallons, an 8-liter bag provides plenty of volume to build depth.

3. Can I combine UNS Controsand Kona with aquarium sand in the same aquascape?

Yes, combining decorative pebble gravel with aquarium soil or fine cosmetic aquarium sand is a popular technique for high-impact aquascaping layouts. You can place aquarium soil in the rear or planting pockets for root growth and use Kona pebble gravel along hardscape borders or pathways for striking visual contrast.

Overall rating: 4.9722223 / 5 from 36 reviews.

AI Generated Review Summary

UNS Controsand - Kona is a decorative sand substrate for planted aquariums, offering strong root development support and compatibility with bottom-dwellers. Its rounded pebble gravel provides a clean and nice-looking appearance, suitable for various aquascaping needs.

Summary topics

  • Pebble Quality (18%): Based on a significant number of customers, the consensus is that the pebbles are perfect.
  • Aesthetic Appeal (25%): Many customers expressed appreciation for the excellent looks of the product, mentioning its clean and nice-looking appearance.

Review topics: ["color","shipping","quality","pebbles","looks","substrate","gravel","order","tank","dust"].

Review highlights

  • "It looks beautiful and the packaging was great, I'll be eventually switching all my tanks to controsoil." — Stephanie H.
  • "Nice looking smooth pebbles!" — William
  • "Perfect little pebbles" — Lindsey A.

Reviews

Perfect little pebbles

"I've been searching for substrate that looks like little river pebbles and this one is perfect; I absolutely love it!"

— Lindsey A. (5/5)

My pleco is thrilled!

"He loves his new setup with river rocks and this new gravel!"

— Kacey M. (5/5)

I like the color and

"I like the color and consistency, Uns always has quality stuff"

— Kenneth H. (5/5)

"Buce is a fantastic company to work with, very nice very helpful!"

— James (5/5)

Clean Look, Consistent Grain

"High-quality substrate with a uniform grain size and natural color. Easy to rinse, minimal clouding, and it looks great in the tank. Perfect for aquascaping and plant growth—very happy with this purchase."

— Galen M. (5/5)

Looks just like the picture.

"Looks just like the picture. I like it a lot for scatter gravel."

— Stevan J. (5/5)

As advertised

"It looks like it does online in person. What more can you ask for from a gravel?"

— Ryan D. (5/5)

pricing could be better

"the product is just as advertised, but pricing could be better"

— SHALOM C. (4/5)

Pdeffg

"Gorgeous material, can’t wait to use it, I’d recommend rinsing first as with any substrate it’s not perfectly cleaned"

— Steven D. (5/5)

Use These Tiny Pebbles to Add Details

"How does one review a 3l bag of pebbles? Mention the color, it's uniform, and matches well with the Maui sand. How did it flow from the bag to a container when dry? Flows well, very little dust. This is the 8th UNS Substrate I've purchased. Why so many? They work well in my use case."

— Nathan F. (5/5)

Q&A

How many Ls should I get for a 5gal tank?
Hello Cassidy! Thank you for your question. Depending on how much you'd like, please feel free to use our convenient substrate calculator: Length x Width x Desired Substrate Height (in inches) Divided by 60 = Liters of substrate needed We hope this helps! Please contact us at support@buceplant.com if there is anything else we can assist you. Kindly, Team Buce Plant