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.

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SeachemFlourish Tabs Growth Supplement - Aquatic Plant Stimulant 10 Ct

SeachemFlourish Tabs Growth Supplement - Aquatic Plant Stimulant 10 Ct

4.6/5

Product ID: 253420174

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Details

Brand
Seachem
Liquid volume
10 Gallons
Item weight
0.02 Kilograms
Item form
Tablets
Target species
Fish

🌱Time-released root nutrition

🕒Lasts 3-4 weeks per dose

⚙️Essential trace elements & vitamins

Description

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

PRECISION NUTRIENT DELIVERY - Time-released tablets ensure steady fertilization without altering tank pH.
ROOT ACTIVATED GROWTH BOOST - Directly nourishes roots with essential amino acids and vitamins for vibrant aquatic plants.
SAFE ALLERGEN FREE FORMULA - Yam-free, non-toxic tablets designed for all aquatic life stages and tank setups.
EFFORTLESS MAINTENANCE ROUTINE - Replace every 3-4 weeks to keep your aquatic garden thriving with minimal hassle.
OPTIMIZED DOSAGE FOR EVERY TANK - One tab per 4-6 inch radius guarantees balanced nutrient distribution in your aquarium.

Seachem Flourish Tabs are specialized aquatic plant growth supplements delivering essential trace elements, vitamins, and amino acids directly to plant roots via time-released tablets. Designed for easy insertion into aquarium gravel, each tab supports steady, balanced fertilization without affecting water pH, promoting lush, healthy aquatic plants with a simple maintenance schedule of replacement every 3-4 weeks.

Specifications

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

Reviews

4.6

All from verified purchases

R**Y

As described

Helps grow plants healthy on my fish tank.

11.05.2022

R**R

Didn't work out for me

Tries these root tabs for my amazon sword but didn't work out

25.10.2022

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TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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€ 26.89

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TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago