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Flourish Excel™ is a source of bioavailable organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but, may also be derived from simple organic compounds (such as photosynthetic intermediates)..... Show Details

Flourish Excel™ is a source of bioavailable organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but, may also be derived from simple organic compounds (such as photosynthetic intermediates). The use of either CO2 injection or Flourish Excel™ does not necessarily negate the use of the other. Because the processes of producing photosynthetic intermediates and building onto them occur simultaneously, one can derive a substantial benefit with the use of Flourish Excel™ either alone or in conjunction with CO2 . The combination is particularly ideal for situations when continuing to add CO2 could result in dangerously low pH levels. Flourish Excel™ also has iron reducing properties which promote the ferrous state of iron (Fe+2), which is more easily utilized by plants than ferric iron (Fe+3).

The reason plants need CO2 is to produce longer chain carbon compounds also known as photosynthetic intermediates. Photosynthetic intermediates includes compounds such as ribulose 1,5-bisphosphate, and 2-carboxy-3-keto-D-arabinitol 1,5 bisphosphate. Although the names are complicated, the structures are quite simple (5 carbon chains). Flourish Excel™ does not contain these specific compounds per se, but one that is quite similar. By dosing with Flourish Excel™ you bypass the involvement of CO2 and introduce the already finished, structurally similar compounds. It is in its structural similarity that Flourish Excel™ is able to be utilized in the carbon chain building process of photosynthesis. Simple chemical or enzymatic steps can easily convert it to any one to any one of the above named compounds (or a variety of others).

  • Bioavailable organic carbon source for the planted aquarium
  • Use as an alternative to CO2 injection or in addition to it
  • Introduces photosynthetic intermediates

Available Sizes:

  • 100 ml (3.4 fl oz) bottle
  • 250 ml (8.5 fl oz) bottle
  • 500 ml (16.9 fl oz) bottle
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Canada Post has begun the process of safely ramping up and stabilizing operations across the country. With a large, integrated network of processing plants, depots and post offices, stabilizing operations will take time and the company asks Canadians for their patience.

  • Canadians should expect delivery delays through the remainder of 2024 and into January 2025.

Canpar has issued a delay in service notification due to increased shipment volumes and inclement weather in some areas.

Petland ships orders Monday through Friday (excluding statutory holidays).  We use Canada Post, Purolator & Canpar for delivery.  "Free Shipping" will usually be sent through Canpar Ground service.  Canpar Ground & Purolator Ground services do not have guaranteed delivery times and the shipping times will only be estimates.  

Orders made online after at 11 AM CST on Fridays will ship the following business week.  When considering delivery times after an order is placed, please allow 1-3 business days to process your order. Courier delivery times do not include the day the order has been picked up from our warehouse. 

Orders that include "special order" items will not be shipped until the "special order" item arrives in our warehouse.

Please provide a street address if you choose "Free Shipping", Canpar or Purolator as your shipping method. 

  • If you have a PO Box, Rural Range Road, Township Road or Site land location address, you must choose Canada Post as your shipping method.
  • If your address is an apartment or condo, please include the buzzer number.

Both Canpar and Purolator shipments will require a signature upon delivery unless you have requested the shipment to be left at your front door with "no signature required". **  If you do not make this request and are not home to receive your order, an attempted delivery notice will be left at your front door.  The notice will indicate the depot where you can pick up your shipment.

**Please note that neither Petland nor the delivery service is liable for any lost or stolen packages if you have requested the shipment to be left at your front door.

Undeliverable packages:

Occasionally, we will have a package returned to us because it was undeliverable. When this occurs, we will issue a full refund for the price of the product plus taxes. Shipping charges are non-refundable.  If your order had "Free Shipping" the shipping charges incurred by Petland for your order will be deducted from the total product refund amount.

We can receive packages as undeliverable for the following reasons:

  • Missing house number, unit number or buzzer number
  • Missing street name, City, or province
  • Incorrect Postal Code
  • Failed delivery attempts or the item was not picked up from the local depot within 5-10 business days.
  • Refused by the recipient.

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