SEACHEM Flourish Excel | 250ml 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). Why Its Different 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). DirectionsOn initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 gallons*). Thereafter use 1 capful for every 200 L (50 gallons*) daily or every other day. Dosing may be slowly increased in high-growth aquariums. For smaller dosing please note that each cap thread is approximately 1 mL. .. Shipping: We ship all our items through DTDC, Blue Dart, FedEx & India Post Courier Services and deliver the items within 1-7 working days depending on the nature and volume of the items at most of the destinations across India. Shipping time is only estimated and not guaranteed. The courier company requires the correct address, and the telephone number of the buyer for on time delivery. Please make sure that someone is available to receive the parcel. In case of parcel return due to no door service, the expenses of resending the parcel will have to be paid by the customer. Item will be shipped to your eBay registered address within 2-4 business days after the payment is confirmed. No change of address will be entertained. Once goods are dispatched, an e-mail will be sent out containing the dispatch details of your shipment. Terms Of Sale: If you have any problems or concerns whatsoever with your order or product, please message us and give us a chance to assist you before you leave any feedback. We believe we can produce a positive outcome to any situation and will work hard to earn your praise. Positive feedback of satisfied customers are our testimony of service with trust. If product received is defective, please return it within 3 days of receipt and we will courier a replacement. About Us: Fish Cave is specialized in all types of aquarium products such as fish food, filters, heater, accessories etc. If you dont find any product here, feel free to contact us through mail so we can list the required item on eBay (if available), so you can purchase easily through PaisaPay payment gateway. Contact Us: If you have any questions, please feel free to message using the ask the seller a question option 24 hours a day, 7 days a week. We will respond to your messages within 24-72 hours. If you need any further clarification regarding the product, please do not hesitate to ask us, we would be glad to assist you.