BRIGHTWELL ChaetoGRO Macroalgae dosing



    ChaetoGro is a multi-nutrient fertiliser especially formulated  for the use in the marine aquarium. This ready mixed solution will improve the growth of macroalgae like Chaetomorpha / Chaeto & other macroalgae species in planted marine aquariums and ULNS systems, where missing nutrients limited the marine algae growth.


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    BRIGHTWELL ChaetoGRO 250ml / 500ml

    ChaetoGro provides 13 important elements which are crucial to grow successful macroalgae in the planted Display Tank or planted refugium/sump. It will support a healthy macroalgae growth which can more effectively help to lower the Nitrate and Phosphate levels in the marine aquarium. Unlike most other available fertiliser for the aquarium, which often are made for the use in freshwater aquariums, this does not include any copper, which is toxic to most marine organisms.

    Technical Background

    Macroalgae will need besides good lighting Major and Minor nutrients for an optimal growth in the marine aquarium.
    ChaetoGro from Brightwell Aquatics provides these minerals in concentrations found by researchers to be necessary for long-term health of various algae species. 

    Instructions Guidelines

    • Shake BRIGHTWELL ChaetoGRO well before using.
    • Starter recommendation: 
      Dose 5ml (1 capful) of it per 20 US-gallons(76l) of aquarium water twice each week for the first 2 weeks of use and increase the dosage when necessary thereafter.
      When used in this way, 500 ml will treat up to 7,600 L
    • Expert recommendation:
      To maintain a more stable and natural environment a daily dosing is more recommended than dosing once a week. 
      For daily dosing add 8 drops per 100 l and adjust dosing volume after one week when necessary depending on the macroalgae growth and its need for nutrients.
    • For a strong Chaeto growth it is recommended to maintain a minimum Nitrate level of 3-5 ppm and phosphate level of 0.01 ppm, as otherwise an optimum macroalgae growth may not be possible.


    Keep out of reach of children. Not for human consumption.

    Guaranteed Analysis

    0-0-1.30; Potassium (K) as Soluble Potash (K2O) (min) 1.30%; Boron 0.009%; Calcium 0.14%; Carbon 0.005%; Chlorine 0.39%; Cobalt 0.0004%; Iron 0.1%; Magnesium 0.4%; Manganese 0.0475%; Sulfur 0.16%; Molybdenum 0.004%; Zinc 0.002%.


    We want you to be fully happy with your new macroalgae addition. Therefore we offer you a hassle free Satisfaction Guarantee.  

    If you are not 100%  happy with the macroalgae you have received on arrival we will refund you the full money back.    *1
    We even will cover the return costs. The refund will be offered after we arrived and checked the returned marine algae.

    *1 = Valid for UK Orders only, please see our Terms for EU orders HERE 


    We offer for sale macroalgae from our mature macroalgae mother colonies in a premium quality & 100% healthy within the UK and EU.
    All live algae species are sustainably grown in the UK.

    All macroalgae will be well protected when posted to you to ensure that it will arrive in the best condition at yours.


    We won't be beaten on the premium quality of our live algae cultures, and surely not on the price either!

    Have you seen the same macroalgae somewhere else cheaper?

    Please just send us a message HERE and we will check your request within 24 hours ( working days only ).

    When we can match the other price we will send you a discounted offer which will be valid for the next 7 days after receiving our email.
    This offer will be just valid for purchases using the same email address provided before.

    The price match offer is only valid for identical, same size/amount and available macroalgae species.
    As a proud UK based tax paying business, we don't price match any offers against auction sites or from private sellers.

    The price match offer is just valid for UK deliveries. We reserve the right to refuse a price match request.

    If you have any questions please don't hesitate to contact us.

    Your Livealgae UK

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    Reviews Reviews (1)

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    Chaeto Booster

    0 of 0 people found the following review helpful

    My Chaeto was not growing and was slowly falling apart. Tried dosing Nitrate and more feeding but didn\'t helped. After adding Chaetogro it grows like there is not tomorrow. Super green and much stronger. Now I have to clean my macroalgae reactor every 2 weeks vs once every 6-8 weeks Good product and will order again.

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