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Seachem Flourish; Excel

$14.97

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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Shipping

Petland ships within Canada, Monday through Friday (excluding statutory holidays). Orders made online after Friday at 11 am CDT will ship the following business day (subject to daily order volume and warehouse availability). When considering delivery times, please allow 1-2 business days to process your order after the order is placed. Courier delivery times do not include the day the order is picked up from our warehouse. 

Petland will happily ship to your home and/or office. Normally, we use Canada Post, Purolator & Canpar for delivery.  "Free Shipping" will usually be sent through Canpar Ground service or Purolator ground service. Canpar Ground & Purolator Ground services do not have guaranteed delivery times and the shipping times will only be estimates.

Changes to our shipping policy due to the Canada Post Labour Negotiations:

The Canadian Union of Postal Workers (CUPW) has launched a nationwide overtime ban for employees in both the Urban and RSMC (Rural and Suburban Mail Carriers) bargaining units. This is a legal strike action and means that CUPW-represented employees will refuse to work overtime across the company. As a result, Canada Post will continue operating but customers may experience delays. 

We will continue to ship out orders using Canada Post if you have chosen this as your method of shipping.

We advise you to stay informed by checking Canada Post's website for updates.

As of August 01, 2025, Canada Post stated on their website that the majority of CUPW-represented employees reject Canada Post's final offers.

Corporation evaluating next steps following vote outcome

If the union issues a strike notice, all Canada Post operations will shut down.  Mail and parcels will not be processed or delivered for the duration of the national strike, and some post offices will be closed. Service guarantees will be impacted for items already in the postal network. No new items will be accepted until the national disruption is over.

All mail and parcels in the postal network will be secured and delivered as quickly as possible on a first-in, first-out basis once operations resume. However, a national strike of any length will impact service to Canadians well after the strike activity ends. Shutting down facilities across the country will affect Canada Post’s entire national network. Processing and delivery may take some time to fully return to normal.

In the event that there is a Canada Post national work stoppage:

  • We will only be shipping through Canpar or Purolator.  "Free Shipping" will be sent through Canpar Ground service or Purolator Ground service. Canpar Ground & Purolator Ground services do not have guaranteed delivery times, and the shipping times will only be estimates. If you are shipping the order to your business or workplace, please include the business name in the shipping address.  Unfortunately, Canpar will not deliver to rural locations (see link further down).
  • Our website will still offer Canada Post shipping as an option.  However, if you choose this method of shipping, it will not leave our warehouse until after the Canada Post strike is resolved.

If you are shipping the order to your business or workplace, please include the business name in the shipping address.  Unfortunately, Canpar will not deliver to rural locations.  For a complete list of these postal codes, click HERE

Orders may be subject to cancellation or require additional confirmations for the following instances due to the risk of fraud:

  • The Billing and Shipping addresses are different, and the shipping address is not a Business.
  • Orders with international billing addresses

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.
  • If you are shipping to your business or work, please indicate the company name.

Initial orders will require a signature upon delivery.  If you are placing your first order and want the shipment left at your front door with "no signature required", you can enter the request in "Special instructions for seller" on your cart page.  If you have already processed your order, you can email the request before noon of that business day through our "Contact Us" page.  If you place your order on the weekend, you must email the request by noon on Monday. If you have made the request, your subsequent orders will include the request for "no signature required". 

If you do not make the request and are not home to sign for the package, Canada Post, Canpar & Purolator will take the shipment to one of their locations where you can pick up your package. 

*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.

Risk of Loss and Shipping and Delivery:

All items purchased from Petland.ca are made pursuant to a shipment contract with a shipping carrier. This means that the risk of loss and title for such items pass to you upon delivery of the Products to the carrier. Products will be shipped to the address designated by you, if applicable, so long as such address is complete and complies with any shipping restrictions contained on the site. The time and location of delivery of the products to you is at the discretion of the carrier. 

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.

Petland.ca customers have toll-free access to highly trained customer service reps for solutions to a variety of pet questions. Contact us with any questions or concerns.

Customer Reviews

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Frank
Prices too high

review is on your store not the product. Just went to amazon now and compared prices petland = $32 amazon = 24 Who on earth buys products from you? I am just curious.