On January 10, 2012:
This is a wonderful substitute if you don't have pressurized CO2. I have tried using it in one tank and not in the other and the one I used it in showed much better growth. I will be using this until I can afford pressurized CO2.

On October 6, 2010:
I LOVE Flourish Excel. I think it's a must have if you have a planted aquarium with low or DIY Co2. Although it's not intended to control algae, it DOES, which is a great side benefit. My plants grow like crazy and my Ludwigia and flame moss "pearls" with my first dose (I double the first dose, it works for me, but every tank is different so I would experiment before dumping it in) Also, if you are thinking about buying this, do yourself a favor and get it here. You will NOT find it cheaper anywhere else. Trust me, I've looked, because the $$ makes it too high to use regularly. I just bought the 500ml from my LFS at almost twice the price and I could kick myself for not looking here first. I always order my lights and other higher priced aquarium items from this site because their prices CANNOT BE BEAT - but I never checked their prices on the smaller stuff like de-chlor and my Excel. If I would have shopped here, I would've saved $14 altogether AFTER factoring in shipping. I have learned my lesson, and will be ordering everything from my lights to my fish food from this site from now on... and my Excel, of course :)

On September 15, 2010:
At first I was skeptical of this product and doubtful it would work, but it definitely does work, and my plants are doing much better now that they receive an adequate dose of carbon. It also works well on some types of algae, though you need to be very careful and monitor your fish because too much Excel will harm/kill them. Remember to dose only at night or when the lights are off - UV breaks down the ingredients.

On August 30, 2010:
I use it to control BB Algae and in a weeks time a recommended dose it is gone. I have been using it for years+++

On September 14, 2009:
FYI - why not remove fish to another aquarium while treatment for algae is going on.... I do not have algae problems (use of bio bugs from lab) but would never sacrifice a fish or more in this manner. I use Excel to supplement DIY co2, on low light low plant 75 (while some may say no co2 for low light there is different quality and it helps with water chemistry and other factors).... with the addition of S. Excel, the moss buds greener and grows fast (several inches in a month) even in low light, plants such as Anubias do super and start sending out new leaves.... co2 alone growth slows considerably.

On January 18, 2008:
This is an great product for amateur aquarium plant lovers. Of course it is cannot be compared to CO2. Good price from Petmountain.

On September 16, 2007:
Used this product to kill algae. Had to use 3x dose but algae was gone in 3 days. Lost only 1 oto. Plants doing great now also.

On September 3, 2007:
I had heard all about Excel's abililty to hold down algae, and it does work very well for this (you need to dose more than is directed, and this can be hard on some of your little fish ... I lost some SAE's). Makes the plants grow well.

Also be careful on getting it on your hands. Very potent. I washed my hands lightly and rubbed my eyes and they got very inflamed.

On August 4, 2007:
Since I tried flourish excel for the first time in my 100 % planted tank I noticed a big change within 3-4 days in the way the plants were growing and the algea was dying. I plan on using this product until seachem comes out with a better product for controlling algea without hurting my plants. Thanks SEACHEM!

On January 24, 2007:
Seachem Flourish works great, I highly recommend it for any planted aquarium.

On January 23, 2007:
Work great as alternative for pressurized CO2 and for algae problem too.