What causes this product to kill algae, and does it kill anything else (like beneficial bacteria)?

I bought the Seachem Flourish Excel because it seems to be the best solution to a Black Beard Algae problem I'm having, and after studying what it does, and how it does it, I too was worried about the Beneficial Bacteria in my 2 large canister filters.Couldn't find a direct answer to that question, so I sent an e-mail directly to Seachem Laboratories. Here is my question to them and their reply...... Message: I have a 72 gal heavily planted community tank and am having an outbreak of Black Beard Algae. I purchased your product as it seems the best solution to the problem, but I need a question answered before I can use your product. I now understand how your product works, but will this product also kill off the Beneficial Bacteria inside the Seachem Matrix Bio-Media of my 2 large canister filters?! Crashing the cycle in my tank is not an option. Is this product (Flourish Excel) safe to use for the bacteria that maintains the nitrogen cycle of my tank, or will it kill the bacteria in my filter media along with the Black Beard Algae and crash the nitrogen cycle of my tank? Need a straight answer, please, Thank You Seachem Support 10304 (Seachem Laboratories) Sep 23, 2022, 16:31 ADT Hi there, thanks for reaching out! No, Excel will not affect your biological filtration if dosed appropriately. Hope this helps! Seachem Support 10304 Needless to say, I am very relieved, and pleased. Now I can start the process of getting rid of that Black Beard Algae and not worry about crashing my nitrogen cycle. 2 Thumbs Up to Seachem Laboratories!

are they copper free?

No. They contain 0.001% copper. Though people have used them in shrimp tanks without a problem, others have had shrimp die, particularly if the tablet got stirred up from the substrate (rescaping, fish burrowing, etc). If there's a chance of your substrate being disturbed, I'd recommend going with API Root Tabs instead, as they do not contain copper.

How I use this for my tank 20 gallons

Per the instructions: "On initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 US gallons). Thereafter use 1 capful for every 200 L (50 US gallons) daily or every other day. For smaller dosing please note that each cap thread is approximately 1 mL." 1 cap = 5ml 1 cap for every 50 gallon equates to 1 ml for every 10 gallons or 2 ml for 20 gallons.

Is the product compatible with freshwater invertebrates, like amano shrimp?

I use this product on a regular basis and I have snails and shrimp in my tank. No problems.

Desertcart Logo

Deliver to Tunisia

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🌿 Unlock your aquarium’s green potential with every tablet!

COMPLETE VITAMIN COMPLEX - Packed with iron, manganese, magnesium, calcium, potassium, and vital B vitamins for holistic plant health.
EASY TO USE TABLET SYSTEM - Simply insert into gravel every 4-6 inches; one tablet supports a 10-gallon tank for hassle-free maintenance.
ROOT POWERED GROWTH BOOST - Directly nourishes plant roots with essential trace elements for vibrant, lush aquatic plants.
PRECISION NUTRIENT DELIVERY - Time-released tablets ensure steady fertilization without water pH disruption—perfect for balanced ecosystems.
CONSISTENT AQUARIUM VITALITY - Replace every 3-4 weeks to maintain thriving aquatic greenery and elevate your tank’s natural beauty.

Seachem Flourish Tabs are specialized aquatic plant growth supplements delivering essential trace elements, vitamins, and minerals directly to plant roots via slow-release tablets. Designed for easy insertion into aquarium gravel, each tablet supports a 10-gallon tank and promotes sustained, healthy plant growth without altering water pH. Ideal for all aquatic life stages, these tablets ensure vibrant, lush underwater landscapes with minimal effort.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

137.25 DT

Duties & taxes incl.

Tunisiastore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Pet Type	Aquatics, Aquatics Water Conditioner, Aquatics Water Conditioner Plant Care, PetSupplies
Product Dimensions	20.1 x 12.7 x 1.5 cm; 23 g
Item model number	67105050
Pet Life Stage	All Life Stages
Item Form	Tablets
Allergen Information	Yam Free
Color	Original Version
Size	10 ct
Volume	109 Milliliters
Number of Items	1
Quantity	1
Specific Uses	Active
batteries required	No
Batteries Included	No
External Testing Certification	Não aplicável
Item Weight	23 g

SeachemFlourish Tabs Growth Supplement - Aquatic Plant Stimulant 10 Ct

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions