Seachem Flourish Excel: Organic Carbon Source for Aquatic Plant Growth - 2L Bioavailable Carbon

Blais maryseBlais maryse: Excellent

Canada on Aug 14, 2023

Luz Díaz: Producto perfecto

United States on May 01, 2023

hazel: This product is very effective and the price is cheaper than retail store. I will buy again if there is a promotion.

Singapore on Apr 22, 2023

Matt: If you're not using CO2 with your planted aquarium this is pretty much a must if you use this your plants will be vibrant and green and no weird algae is growing and taking over plants before I use this product I had algae problems and plants weren't doing as good after using this product no weird algae and plants are looking amazing

United States on Feb 21, 2023

Alain: bien

Canada on Jan 30, 2023

Wesker-Kun: Been tired of buying those 125 - 500 ml bottles from those super pet store and the price they sell them at.
Very happy with the price and the product being 2 Litres.
Will buy from again.

Australia on Dec 26, 2022

E Lee: Had tried various methods to control the growth of black algae in my heavily stocked aquarium (~350 gallons) with arowanas and tiger fishes. The aquatic shop even gave up and told me to strip the plants and keep a bare tank. I researched on what the causes of black algae bloom is and insufficient carbon was a key contributor. Since I couldn't increase the CO2 diffusion without harming the fishes, I tried this Seachem Flourish Excel as a last resort and within days, the algae started disappearing! And while there are still some algae growth in my tank, it's now manageable and not the unsightly mess it once was! Great product and this beats any other fertilizers out there!

Singapore on Nov 18, 2021

Miranda LopezMiranda Lopez: This product worked wonders for my tank. I had battled black beard algae in the past but didn’t realize the root cause of it fast forward to now, I had moved and set up a new tank and started having the same problem again! So I started researching and it led me to realize my planted tank was lacking CO2. I had recently added more light and my plants started taking off tremendously and the BBA started to appear. I decided this was the product for me vs an actual CO2 line. I followed the directions and upon the initial dose (my tank is a 54 gal corner) it did make my water appear white and hazy even after a water change. I have a community set up from corydoras, oto’s, platies, nerite snails, dojo loaches and khuli loaches. All my fish handled this product well except my corydoras. I have a had time keeping those as is but those were my two survivors that I managed to keep alive and I believe this product did cause them pass. So just note that they may be sensitive to this product. I still give this 5 stars though. It did as it said and my tank is looking fabulous again!! It took about 2 weeks to clear up an minor infestation.

United States on Mar 14, 2021

Makavelli02Makavelli02: This is a great algae controller for planted tanks.
If you regularly does fertilizer in your aquarium then you know that algae is a problem. Algae can absorb nutrients and Co2 better than most plants. So this is not so much liquid Co2 as it is a product that controls algae thus allowing your plants to use the Co2 and nutrients that are being consumed by the algae.
If you read some of the negative reviews of it killing plants that is from overdosing it. I do not suggest the large initial dose it suggests on the bottle. I use a regular dose every day (75 gallon = 1 cap full. I have even used 2 caps if I have been lazy and not dosed thus letting the algae get out of control. This makes my plants thrive along with fertilizer such as flourish and flourish iron.

This is also a great for a direct spray on spots of concentrated algae. Just put a normal dose in a syringe and spray algae directly. DO NOT SPRAY ANY PLANTS DIRECTLY.

I also use a heavier dose (double my planted tank dose) in my unplanted tanks to control algae. This works very well to create next to no algae.

United States on Oct 19, 2020

Mr. Miami Cuddles: I thought this was important stuff I found. Use it as a reference when necessary.

3 FAQ's on Flourish Excel from the Seachem website.

Q: When I first dosed my tank with all the Flourish products I was experiencing quite a bit of hair algae. Within three days the hair algae had turned a reddish orange and about four days after that it had completely disappeared. Do you have any idea just which of these products could have caused this? I must admit that I have never seen such a dramatic change with the algae when I first used the Flourish products, and I would really like to be able to repeat the experience when ever the algae re-appears.

A: This is a known side effect of Flourish Excel that may sometimes occur. It has been reported to us by other consumers, however it does not occur under all conditions therefore we do not promote it or sell it for that purpose.

Q: I have an AP Bio-Chem Zorb pouch in my filtration system. Will it scavenge the organic component of Flourish Excel?

A: Chemical filtration medias will have a very minimal impact on Flourish Excel but not enough to warrant removing them from your filter when you dose this...

United States on Dec 05, 2010