Search  for anything...
Seachem

Seachem Flourish Freshwater Plant Supplement 500 ml

  • Based on 5,447 reviews
Condition: New
Checking for the best price...
$11.39 Why this price?
New Year Deal · 32% off was $16.72

Buy Now, Pay Later

As low as $2 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE refund/replacement until Jan 31, 2026

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jan 9
Order within 8 hours and 54 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: 500 ml


Pattern Name: Plant Supplement


Features

  • SUPPLEMENT: Seachem Flourish is a comprehensive plant supplement for the natural freshwater aquarium, containing a rich assortment of important micro elements, trace elements and other nutrients.
  • ELEMENTS: In order to benefit your aquatic plants and help your freshwater environment thrive, Seachem Flourish contains potassium, calcium, magnesium, iron, and other important elements.
  • WATER TREATMENT: For best results, use 1 capful (5 mL) of Flourish for each 250 L (60 US gallons) once or twice a week. For smaller doses, please note that each cap thread is approximately 1 mL. Refrigeration is recommended 3 months after opening.
  • SOLUTION COLOR: It is normal for the color of Seachems Flourish to vary by batch as the solution color is dependent on the temperature at which the product was blended. This variation in color is of no consequence to the function of Flourish.
  • SAFETY: Seachem Flourish is safe to use for invertebrates such as shrimp, but is designed to be used in conjunction with other macro and micro-nutrient supplements in aquariums only.

Description

Seachem Flourish 500ml

Brand: Seachem


Liquid Volume: 500 Milliliters


Item Weight: 1.3 Pounds


Item Form: Liquid


Manufacturer: Seachem Laboratories, Inc.


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 7.7 x 2.1 x 1.6 inches; 1.25 Pounds


Item model number ‏ : ‎ 67105130


Department ‏ : ‎ Unisex-Adult


Date First Available ‏ : ‎ June 9, 2004


Manufacturer ‏ : ‎ Seachem Laboratories, Inc.


Best Sellers Rank: #4,922 in Pet Supplies (See Top 100 in Pet Supplies) #22 in Aquarium Water Treatments


#22 in Aquarium Water Treatments:


Customer Reviews: 4.7 4.7 out of 5 stars 5,447 ratings


Item Weight: 1.25 pounds


Department: Unisex-Adult


Manufacturer: Seachem Laboratories, Inc.


Item model number: 67105130


Date First Available: June 9, 2004


Item Package Dimensions L x W x H: 7.53 x 2.36 x 2.32 inches


Item Dimensions LxWxH: 7.7 x 2.1 x 1.6 inches


Item Weight: 1.3 Pounds


Brand Name: Seachem


Target Audience Keyword: fish


Directions: seachem


Country of Origin: United States


Warranty Description: See Manufacturers Website


Model Name: 075231


Color: multi


Size: 500 ml


Material: Plastic


Age Range Description: all


Number of Items: 1


Style: non-toxic


Included Components: fertilizer


Specific Uses for Product: Active


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jan 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Highly Recommended – Plants and Fish Thrive!
Size: 500 ml Pattern Name: Plant Supplement
Review Image by Saul Martinez Saul Martinez
Review Image by Saul Martinez Saul Martinez
Review Image by Saul Martinez Saul Martinez
Review Image by Saul Martinez Saul Martinez
I’ve used Seachem Flourish Freshwater Plant Supplement (500ml) before, and it’s always my go-to. A local store with beautiful plants and a great quarantine process for fish highly recommended it, and I can see why. Pros: - Keeps plants thriving and continuously growing. - Works for all types of aquatic plants - Doesn’t require large doses depending on tank size Cons: - Needs to be refrigerated Since using this, my tank has become even more beautiful—lush, green, and full of life. My fish thrive in a well-planted environment with plenty of hiding spaces, making them more active and comfortable. I also have a separate tank for growing plants, which I sell to a store while quarantining fish before adding them to my main tank. This supplement has been essential in keeping both my plants and fish healthy. Would I buy it again? Absolutely. ... show more
Reviewed in the United States on February 16, 2025 by Saul Martinez Saul Martinez
    • Does What It's Supposed To
Size: 500 ml Pattern Name: Plant Supplement
This fertilizer is pretty much what you'd expect from a plant supplement - it adds nutrients to your tank so your plants can thrive. The instructions are straightforward enough, though I did have some trouble figuring out which cap thread was which at first (I guess they all look the same when you're tired). Anyway, I followed the recommended dosage and my plants seem to be doing well. One thing I noticed is that it makes the water a bit cloudy initially, but that cleared up after a few hours. Not sure if that's normal or not, but it didn't cause any issues (kind of like when I spilled coffee on my keyboard once - everything still worked fine). All in all, Flourish is a solid choice for keeping your plants healthy and happy. It's easy to use and does its job well, so no complaints here. ... show more
Reviewed in the United States on February 25, 2025 by ryross
    • This product works very well
Size: 500 ml Pattern Name: Plant Supplement
I use this product along with their iron product and my plants grow amazingly well some of them like frog bit grow a little too well I have to scoop off the top of my tank literally every two days it grows that fast
Reviewed in the United States on September 4, 2025 by Paul
    • Only because...
Size: 500 ml Pattern Name: Plant Supplement
Great product, except the cap on mine came broken. If it wasn't for the 2nd cap on there, i would've lost it all. That's the only reason why i gave it a 4/5...
Reviewed in the United States on October 10, 2025 by Alberto Martinez
    • Amazing for live plant aquariums
Size: 500 ml Pattern Name: Plant Supplement
Review Image by J Akes J Akes
Review Image by J Akes J Akes
Review Image by J Akes J Akes
Am new to aquariums and learning as I go. Have had my tank for about 3 months now and found advice on how to set it up and keep it healthy very varying depending on whom you were talking to. But after getting my tank set up with water wanted to dress it up a bit before purchasing my fish to start the cycling. Thought live plants would be a great addition and also create a more true bio-system for my aquatic pets once they arrived. But my plants weren't doing well after the first week and found this online in several bulletin boards as the item to get to help them get the nutrients they needed without harming animals I put in my tank. I have a 29 gallon tall tank purchased from a local box store, it came with everything I needed for a basic starting point to improve as I could afford to. I purchased 7 plants one of which died before ordering this product. My levels were out of whack, I check them once a week and as needed to keep track of what worked and what doesn't for me personally. But after using this product for one week noticed new growth, after two weeks the plants that were stressed and turning yellow in color have greened back up. Since have added 5 red eyed tetras and 3 albino cory cats to the tank and everyone is doing well. My numbers are safely within perimeters and it is beginning to look more and more like the tank of my dreams. I did develop a minor issue with black mold but did a total black out for 48 hours and added 5 mystery snails to clean what I missed after physically removing all I could. I also found this locally since then and plan on continuing to use it in future tanks and my current one. Has proven safe for all creatures in my aquarium, makes my plants look and grow very well. Would recommend this to any novice aquarium keeper for a safe and easy solution. I add 1/2 a capful twice a week to my tank near my water filtration outlet to keep it in the water without overdosing the water. From everything I read it stays in the water for 24 hours. I only feed my fish every other day to minimize overfeeding and so far am loving my aquarium and regretting not trying this sooner. My previous experiences with having an aquarium have not done as well as this one. Am glad I kept trying and trusted in quality products to help me overcome any issues that have arisen. ... show more
Reviewed in the United States on July 21, 2019 by J Akes J Akes
    • Fantastic
Size: 500 ml Pattern Name: Plant Supplement
Really great for aquatic plants. I used this as well as other supplements and water treatments but after using this fertilizer my plants grow like crazy and are very healthy. My only thing is don’t use to much as it can actually harm the plants. Not much is needed so it lasts a long time.
Reviewed in the United States on April 30, 2025 by London Goff

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...