Skip to content

UNS Controsoil Brown

Original price $ 21.99 - Original price $ 69.99
Original price
$ 21.99
$ 21.99 - $ 69.99
Current price $ 21.99
Substrate Size: Normal
Size: 1L

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!

New bag design, same amazing soil!

Ultum Nature Systems Controsoil is an aquarium soil from Japan made of high-quality natural soil and volcanic ash. Choosing a proper substrate is vital for any successful planted aquarium. This is not only for aquarium plants to flourish but also to buffer the water to optimum levels for certain fish and shrimp.

Controsoil by UNS will keep the pH of alkaline water below 7 which is ideal for keeping Caridina shrimp and most tropical fish. 

Controsoil is the perfect solution for those who want good plant growth without the headache of excessive ammonia. With other aquarium soils, it is common to experience algae spikes during the initial month or two of a new set up. This is commonly referred to as “new tank syndrome” and is characterized by brown or green algae on the glass, aquatic plants, and hardscape along with cloudy or smelly water.

This phenomenon is caused by high levels of ammonia (NH3) which many soil manufacturers add to their products. Although the ammonia helps to cycle the tank, too much can cause problems so it is necessary for users to do daily water changes during the first few weeks of use until the planted tank is established. However, many users have reported success with using Controsoil and adding shrimp or fish within 24 hours of a new set up, but we always recommend cycling the tank first and making sure ammonia and nitrites are at 0.

How much soil do I need?

Length x Width x Desired Substrate Height (in inches)

Divided by 60

= Liters of soil needed

Specifications:

Medium Granules ~ 5mm

Good for larger tanks (20 gallons or above) with larger plants. 

Fine Granules ~ 3mm

Perfect for smaller tanks (Less than 20 gallons), or to use as a topcoat to place on top of medium granules. Finer soil granules help small root plants, such as Hemianthus Callitrichoides, to anchor into the substrate easier. This also helps prevent pesky floating upon filling the tank.

Extra Fine Granules ~ 1mm

Perfect for smaller tanks (Less than 20 gallons), or to use as a topcoat to place on top of medium and fine granules. Finer soil granules help small root plants, such as Hemianthus Callitrichoides, to anchor into the substrate easier. This also helps prevent pesky floating upon filling the tank.

Overall rating: 4.9333334 / 5 from 105 reviews.

AI Generated Review Summary

UNS Controsoil Brown is a highly regarded aquarium soil known for its quality, fast shipping, and excellent plant growth support. Customers appreciate its natural look, effective pH buffering, and variety of granule sizes suitable for different tank sizes.

Summary topics

  • Tank Aesthetics (8%): Customers appreciated the new planted substrate for their tanks, as it looks very good in their tanks.
  • Granule Size (8%): Customers raved about the size of the granules, mentioning that they were perfect for their needs.
  • Soil Quality (7%): Customers loved the high quality of the soil, praising its consistency, texture, and fast shipping.
  • Shipping Speed (13%): It was noted by customers that shipping was fast and prompt, with multiple mentions of quick delivery.
  • Product Appearance (19%): Many customers remarked that the UNS Controsoil brown looks great and has a great natural look.

Review topics: [size, color, shipping, service, looks, feel, results, works, water, texture, customer service, soil, plants, substrate, tank, growing, grain, size of the granules, controsoil, aquasoil, uns, holds, reason, rinse, experience, nutrients, team, ammonia spike, brown, monte carlo].

Review highlights

  • "Shipped fast and everything came perfectly can’t wait to start my tank with top notch equipment and plants"Gary
  • "The fine substrate makes for easy planting and the color goes well with a variety of hardscape."Julio C.
  • "The color looks great and the plants love it so far."Nick S.

Reviews

My absolute favorite substrate.

"I use this as a topper on all my tanks now. The medium size is perfect to hold any roots from monte carlo to even buce. The spaces between the grains give enough space to let nutrients sink down and soak into the clay to save for later. Also my Khulis loves digging around in it. I also use the small grain in jar terrariums."

Zechariah (5/5)

Nice

"Quick shipping, love the brown look. Controsoil is perfect for my needs, the Fine grain helps with stem plants that won’t stay put. A bit pricey, but worth it. Will definitely purchase for all my future scapes."

Kansas H. (5/5)

Get the Fine!

"Soil arrived as expected. I ordered the large and the extra fine sizes because the ‘fine’ was not in stock. I regret my decision and I wish I would’ve waited for the fine to come back in stock. I mixed the two I ordered and it was not conducive to holding plant roots. Beautiful color though!"

Matthew L. (4/5)

It’s hard to find quality

"It’s hard to find quality brown substrate soil. I love this brown color because it lightens up a dark tank. I ordered the fine grain for a 15 gallon tank. They were out of the larger size bags so I ordered 7 small bags and had enough for my tank."

Bj H. (5/5)

Beautiful, Safe, and Effective

"I love this soil. The color and grain size of the extra-fine size loos very natural. Also it doesn’t overdo it with the ammonia release in the beginning. It’s soft too so I don’t have to worry about a stray grain of sand resulting in a scratched glass surface when wiping down the tank."

Brian B. (5/5)

"Plants love this stuff."

Jonathan (5/5)

Satisfaction guaranteed

"Great product and shipped very professionally. Always a pleasure doing business with you folks!"

Ali M. (5/5)

Looks great, I ordered the

"Looks great, I ordered the fine grain for a 10 gallon aquarium which I think is a good size for my set up. This substrate should help with the success of my plant keeping in my freshwater tank!"

Shamus C. (5/5)

Love it

"this product has the perfect properties for my shrimp and even better nutrients for my plants yielding top results"

Nate B. (5/5)

Plants arrived beautiful and ready

"Plants arrived beautiful and ready for the tank"

Kari B. (5/5)

Q&A

How many bags I need for 20 gallon tank
Feel free to use our convenient substrate calculator: Length x Width x Desired Substrate Height (in inches) Divided by 60 = Liters of substrate needed
Is this substrate safe for Axolotls? With the way they eat, they will definitely consume some eventually. Will it break down safely in their stomach? Or is there a risk of impaction?
Hello Devin, thank you for reaching out to us. We would recommend not to house your Axolotl with Controsoil to avoid that risk.
Could I use this and than cap it with flourite black sand?
Hi Joshua, Thank you for reaching out to us. Yes you can cap UNS soil with black sand, but it may be difficult to keep the layers separate depending on the inhabitants in the tank. Feel free to contact us at support@buceplant.com for any questions or concerns. We are always happy to help! Best Regards, Buceplant Team
I'm debating between the Fine or Extra Fine for my filtered/heated/planted 5.5-gallon tank. It houses one Betta and a variety of plants. Maybe this is silly, but is the extra fine substrate still big enough so that my fish won't get confused and think it's his pellet food? I appreciate any input or advice so that I can make an informed purchase :) Thank you so much!
Hi Courtney, Thank you for reaching out to us and no such thing as a silly question. Either options will work great for a 5.5 gallon planted aquarium. The extra fine will fit the scaling better, but if the main concern is your betta mistaking the soil, we would recommend the fine. Feel free to contact us at support@buceplant.com for any additional questions. Best regards,
How long does the nutrients last in this type of substrate?
Hi Michelle, Thank you for reaching out to us! UNS Controsoil typically last anywhere from 2-4 years. There are several factors that influence the life span of the substrate such as plant density and soil manipulation. An aquarium that is heavily planted will need the substrate replaced faster. More manipulation of soil will result in the granules breaking down faster. Best Regards, Buceplant Team