Seachem Flourish Excel 2 L / 67.6 fl. oz.

I set up a new aquarium 3 months ago. I've had major algae issues. Plants have not been growing like they're supposed to. Nothing has seemed to be going right. I bought this product based on some recommendations on Youtube, and 2 weeks later... the algae is completely gone and the plants are thriving like I haven't seen since I set up the tank. The Amazon Sword plant has sprouted SIX new stems in the last 2 weeks. The Hornwort has reached the top of the aquarium. The stem plants are finally starting to get longer. I wish I'd started using this product day 1. I will buy it again, and again, and again.

I keep coming back to Seachem Flourish Excel because it consistently helps my aquarium plants stay healthy and grow well. After regular dosing, I’ve noticed stronger growth and better overall plant appearance. It’s easy to dose, and the bottle lasts a good amount of time depending on tank size. I’ve had good results using it as part of a regular maintenance routine, especially in planted tanks where I want steady growth without setting up a full CO2 system. The plants respond well, and I’ve seen improved color and vitality over time. As long as you follow the recommended dosing instructions, it integrates easily into a standard care schedule. If you maintain a planted aquarium and want reliable support for plant health, this has been a dependable product in my experience.

I purchased this product after some plants I had bought introduced black beard algae to my aquarium. I tried a couple of other products prior to this with no luck. I tried spot treating with Hydrogen Peroxide and while that did seem to work, it was too difficult to use. I had the algae all over the tank to the point that the Hydrogen Peroxide just wasn't a practical solution. I've been using the Flourish Excel for about five weeks now. After maybe ten days to two weeks, it had basically eradicated my algae problem. I still have a couple of spots of green or brown algae here or there - but it's exactly that, just spots. I suspect the Flourish Excel works better or worse on different kinds of algae (as it completely destroyed my problem Black Beard algae) but even on the algae that it doesn't completely take care of, it certainly reduces it and holds it at bay. Additionally, the plants seem to love it. It took a couple of weeks before I noticed substantial enough plant growth that I was sure it was because of the products and not simply regular expected growth from the plants naturally. I have been using this product in conjunction with a shrimp safe liquid fertilizer and my plants have benefitted greatly. My Amazon Swords in particular have tripled in size since starting this product with the liquid fertilizer. Very pleased. Great product, with no side effects to the fish, snails, or shrimp and crawfish in the tank.

--Update-- The algae has begun to disintegrate and fast. It's patchy now and coming off in clumps. The rocks pictured were 90% covered in dark hair. You can see it is no longer a healthy algae color. The green spots I suspect are cyanobacteria but it hasn't spread beyond those rocks in months. If it does I have Blue-Green Stain Remover which works wonders. After one more day I'll do a good 50% water change and my tank will be beautiful again. This stuff is amazing. They should really advertise its algae controlling properties more. I know it's not really this products job to kill algae, but it seems to be a good side effect of it helping plants grow. It really drives a wedge between aquatic plants and algae. Bought this because I got an infestation of black hair/black beard algae. It came in on the back of an assassin snail and began to cover everything. It's friggin everywhere. After research I found there are 3 options: Start over, use hydrogen peroxide , or use this stuff. Since I added the first dose of this 6 days ago 2 things have happened: The algae has stopped spreading and plants that were struggling or just slow to grow have started improving drastically. I even see a 1/4" of new susswassertang popping out of the algae that is covering it. I've never seen it grow that fast. I wish I had started using this stuff sooner. As of now the algae is not dead yet, but I'm sure it will be since it's color has changed from very dark green to a sickly light green with spots that look like rust. I'm thinking that with the ferrous iron going on, I might even see more red coloring in my ludwigia in the future. I've got tetras, assassin snails, amano shrimp and "pest snails" and they all seem unaffected by the product, so 5 stars all the way. A note about the snails: assassin snails are not a good way to control "pest snails" You put those guys in there and they go to work eating as many pond snails as they are able all the while mating and laying eggs every day. My tanks is going to crash hard when they all hatch. Right now I'm just trying to save my beautiful plants in time to migrate them and the fish and shrimps out. I'm going to migrate some pond snails over as well. Turns out they weren't pests. They were policing the algae better than anything in the tank. The assassin snails mucked that up right good.

Seachem has fantastic products and I do my best to stay with all the same company products for my tank❣️

WILL HELP WITH BLACK BEARD AGLIE IN TANKS SHAME AMAZON TAKES SO LONG TO DELIVER.

Steady progress eliminating the black beard in my 55 gallon tank. I’ve been using one capful every other day over the last two weeks, looks like I am in regular maintenance very soon.

La linea de productos de la marca seachem generalmente no decepcionan, ya los he usado y estoy satisfecho con los resultados.

Ho iniziato il trattamento al mio acquario il 29 Giugno, a distanza di una settimana mi ha ucciso tutte le bba, rindando colore alle mie piante e alla vasca, i pesci ne hanno risentito solo il primo giorno in quanto sono andato con una bella dose d'urto dopo un bel cambio d'acqua, ad oggi i pesci sono belli attivi non hanno dato segni strani, quindi voto positivo il prodotto. Ovviamente non esagerate con le dosi. Promosso!

The excel product works well and seems to be keeping the blackbeard algae at bay. I’ve been dosing at a higher rate so the 4L option made sense, given the price of the 250ml & 500ml options.

Purchased to help tackle black beard algae. It works but if you use too much it will kill the plants and I found I had to put more in than the instructions called for. I won’t buy again. Had better luck with hydrogen peroxide sprayed on the plant. I have shrimp in my display tank and was quite concerned they would not fare so well. So removed the plants, and treated in a small spare tank.

this is the second time I am buying this product. it does what it says, however, please be careful and do not overdose.

Highly recommended product for planted aquarium.