Live Chat Support
    Free Shipping On $75+
  • FREE Shipping On $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on
Orders Over $75
Standard ground shipping (1-7 business days) starts at a low $4.99 and most orders over $75 ship FREE. Learn More
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Additives & Supplements  » Water Treatments & Conditioners  » Bacteria Supplements  »  Seachem Laboratories Freshwater and Marine Stability 4L / 1gal
Seachem Laboratories Freshwater and Marine Stability 4L / 1gal

Seachem Laboratories Freshwater and Marine Stability 4L / 1gal

Average Rating 5 7
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: Seachem Laboratories Freshwater and Marine Stability
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
LOW STOCK ALERT: Only 2 left—order now!
In Stock: Buy now and your order will ship the next business day
Item #:
Was: $68.99
You Save: $6.90 (10%)
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

+ Add to Wishlist
Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
FREE Shipping Promo
MarineDepot.com offers FREE standard ground shipping via UPS on orders of $75 or more for orders containing non-overweight or oversize items (orders which do not qualify for our FREE shipping promotion will still be shipped at a discounted rate).

Terms and Exclusions:
  • Offer valid only on orders shipping within the contiguous United States. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam or other US Territories do not qualify for this promotion.

  • This promotion does not apply to items requiring expedited shipping, such as refrigerated products, frozen products or live rock.

  • MarineDepot.com's FREE shipping promotion does not include products sent in oversized or particularly heavy boxes. This may include but is not limited to aquariums, canopies, chillers, external water pumps, metal halide magnetic ballasts, stands and substrate/sand. These items may be subject to additional shipping handling charges. Should shipping surcharges apply, they will be noted on individual product pages and / or displayed during check-out. We will, however, pay a portion of the shipping charges for these orders.

  • Shipping surcharges, such as special handling are NOT covered under the MarineDepot.com FREE shipping promotion.

  • Shipping charges for returned merchandise is non-refundable. Please read MarineDepot.com's Return PolicyPolicy for more information.

  • Price matched (Low Price Guarantee) or discounted orders do NOT qualify for our free shipping promotion.
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.
Shipping Cost*
Competitor's Website*
*Required information
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

Seachem Laboratories Freshwater and Marine Stability 4L / 1gal Information

SeaChem Stability 4 L

Stability™ will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the #1 cause of fish death: "new tank syndrome". Stability™ is formulated specifically for the aquarium and contains a synergistic blend of aerobic, anaerobic, and facultative bacteria which facilitate the breakdown of waste organics, ammonia, nitrite and nitrate. Unlike competing products, the bacteria employed by Stability™ are non-sulfur fixing and will not produce toxic hydrogen sulfide. Stability™ is completely harmless to all aquatic organisms as well as aquatic plants, thus there is no danger of over use. Stability™ is the culmination of nearly a decade of research and development and represents the current state of the art in natural biological management.

The bacteria used in competing products are inherently unstable. The conditions necessary for their growth and development fall into a very narrow range of temperatures, pH, organic loads, etc. When any of these parameters are not strictly within the proper range, the bacterial culture quickly crashes and dies. Stability™ does not contain any of the aforementioned bacteria.

The bacteria strains in Stability™ have been in development for over a decade. The necessary conditions for growth of our bacterial strains encompass a very broad range. When other bacteria begin to die off (usually from high organic loads caused by the undetected death of an organism), Stability™ simply works harder and grows faster! The strains function in fresh or saltwater. Stability™ contains both nitrifying and denitrifying bacteria, a blend found in no other product. Additionally, Stability™ contains facultative bacterial strains which are able to adapt to either aerobic or anaerobic conditions. The bacteria in Stability™ are non-sulfur fixing, another innovation in the industry. Most other bacterial supplements will form toxic hydrogen sulfide under the proper conditions. Stability™ will not, ever.

Manufacturer Info

Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

Seachem Laboratories Freshwater and Marine Stability 4L / 1gal Reviews

Average Rating
(7 reviews)
Sort Reviews By:


Reviewers Rating Excellent!

Posted: 9/2/2015 from PLANT CITY, FL UNITED STATES
5.0 5
Experience Level: Expert

Comments: Use with care. Split your dose into 4. If you're new to it do your homework. Very effective.

Did you find this review helpful? Yes No

Amazing Product

Reviewers Rating Excellent!

Posted: 7/20/2012 from CO
5.0 5
Experience Level: Intermediate

Comments: This product is the reason the Ammonia and Nitrites did not kill my fish when using the tank transfer method to rid them of cryptocaryon. The test tanks had no biofilter and the ammonia would have overtaken them without this wonderful product.

0 of 1 People found this review helpful, did you? Yes No


Reviewers Rating Excellent!

Posted: 6/14/2012 from DAWSONVILLE, GA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This product has done EXCELLENT at keeping my tank water clean and fish in great shape. No fish losses and water is as clean as when it came out of my well. PH levels not affected, etc...

Did you find this review helpful? Yes No

wil amaze you.

Reviewers Rating Excellent!

Posted: 1/17/2012 from GLENDALE, NY UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This a must buy. If your looking to step or maintian your bioload look no further. No other one on the market works like this.

Did you find this review helpful? Yes No

Seachem Stability

Reviewers Rating Excellent!

Posted: 10/22/2011 from SPRING VALLEY, CA UNITED STATE
5.0 5
Experience Level: Expert

Comments: In my fish room I use Seachem Stability in all of my water changes. This product just gives me the security of knowing that my new water will meet the standards that I want. This an excellent product from Seachem.

Did you find this review helpful? Yes No

DoNot Hesitate and BUY!!!!!!!

Reviewers Rating Excellent!

Posted: 5/23/2011 from TACOMA, WA UNITED STATES
5.0 5
Experience Level: Expert

Comments: I have been fortunate enough to have been around aquariums my entire life and Seachem Stability IS THE BEST way to start up a fish tank whether you are doing a outdoor pond to a 10 gallon guppy aquarium. It will eliminate the need for being patient and adding your prized fish. Do the fish and yourself a favor and buy as much as you can afford. Of course use moderation and follow the direction to a T :) ( I am )

Did you find this review helpful? Yes No

SEEMS to be working?

Reviewers Rating Great

Posted: 6/2/2010 from LONGMEADOW, MA UNITED STATES
4.0 5
Experience Level: Beginner

Comments: Hello all. Yes, I have actually been using Seachem Stability (S.S.) for over a month as of 6/2/10, faithfully 40(+) ml/day - applied after each water change (every-other-day) & the days in-between. I follow the instructions strictly & turn the UV/ozone off for at least 15 minutes to allow the bacteria to come out of dormancy (as a post on the Seachem site indicated, it only takes several minutes), but I'm learning I should be keeping the UV/ozone off for 24 hours...?!?? This messes up the photoperiod, though...I have been told by a few reliable resources that the Bacteria Cycle takes approximately 6-8 weeks naturally (4 if lucky), & You would think having faithfully used S.S. for over a month, it'd be just about complete by now...but my ammonia (NH3) still ranks in at ~1-3--yes, it fluctuates due to a fluctuating fish population--and my nitrites (NO2) have been 0 (ZERO) since I set this aquarium up on April 12 - tested at my Local Fish Store, Petco, & my own Sera dropper test kit.And a note to the fluctuating fish population: it's actually a fully aquatic snake I have, an Acrochordus granulatus ("Banded Elephant Trunk Snake," or "Little Filesnake"), though it does NOT breathe the water. Thus, fish are up & down, via consumption & otherwise. And I believe this may be responsible for the fluctuating NH3.Again, I have been performing water changes every-other-day, & near-100% (!!) with R.O. water, so "Flaps" (the snake's name of course) couldn't have anymore pure water than this, & refreshed so frequently! The webmaster of the afrementioned website swears by S.S., & it seems to be fairly reputable around the net, so I'm going to have to presume it's the fluctuating fish populating that's causing even SEACHEM STABILIY to NOT expedite the Bacteria Cycle to completion. :/ Thus, I'll ALWAYS keep S.S. on hand, as I think it keeps SOME lid on the NH3...

5 of 11 People found this review helpful, did you? Yes No

Accessories for Seachem Laboratories Freshwater and Marine Stability 4L / 1gal

Please make a selection 
WIN A $370 OF SUPPLEMENTS! Sign up for hot deals, helpful videos + a chance to win a year’s worth of AquaMaxx supplements!