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Neutro Bromo Blue For CO₂ Drop Checkers - 100ml


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    Neutro Bromo Blue solution can be used with all drop checkers and is the only solution you should be using in a drop checker. Does not require mixing or anything else.

    Directions: Add a few ml to your drop checker, then pop the unit directly into your aquarium and wait to see the colour change. Ideal colour to aim for green. Blue means too little, yellow means too much. Adjust your CO₂ output accordingly.

    You may also want to consider the 3ml Pipette which is used to dispense the Bromo Blue liquid into the drop checker. If your drop checker stays blue you simply need more CO₂. Simple as that.

    Shipping info

    All our products are in stock, ready to ship (unless otherwise stated). Order before 4pm for same day dispatch (Mon-Fri). Prices start at £4.99 for a Tracked 48 Service (up to 5kgs) and £8.99 for Express Delivery via DPD.

    Our Delivery Promise To You

    If you choose Express Delivery, we will replace any plants that are damaged due to delays. Express Delivery is a fast, trackable, and reliable option with a one hour delivery window. It also ensures that the plants will arrive in the same condition as when they left our facility. If you choose a different postage option, such as Tracked 24 or Tracked 48, you will not be covered for any damages due to delays and will assume the risk yourself if the plants do not arrive in good condition. Express Delivery includes an insurance policy, which may cost more but provides added peace of mind.

    Neutro Bromo Blue 100ml - Aqua Essentials


    • All In Stock

      Everything you see on the site is in stock, ready to ship. No special orders, no waiting around.

    • Fast Dispatch

      Fast shipping. If you order before 4pm Mon-Fri, we'll ship the same day. Whoooosh.

    • Easy Checkout

      You'll find our checkout smooth and silky for a comfortable shopping experiece. Welcome to First Class :)

    Customer Reviews

    Based on 105 reviews

    Well worth the money. Does exactly what it says on bottle.

    Graham Foulkes
    Promo blue

    Very good product and a a more affordable than the smaller ones quick delivery as usual

    Tomasz Bogacz (absentia)
    Great product at good price

    Nice indicator fluid. Very distinct colour, much better than JBL that I have been using previously.

    Andy O
    Neutro Bromo Blue

    Great product, great value, and great service.

    Karolyne Oldfield OLDFIELDt

    As I said before the instructions were on the bottle so was easy to work with.

    Paul Refson

    This product does what it says on the instruction sheet and is good value for money.



    Philip K.

    Good value for money.

    Philip K.

    Good value for money.

    Darren C.

    I was paying out more for a named bottle that was only 10ml !!!
    I tried this along side my regular drop checker solution and it works exactly the same, wish I’d found this earlier !!!

    We're environmentally friendly

    • 1. Sustainable Packaging

    • 2. Fast Delivery

    • 3. Guarantee

    Your plants will be wrapped with recyclable Honey Comb wrap - sounds cool because it is :). It interlocks which means we don't need to use tape either, reducing our impact on the environment.

    Not only is delivery fast with DPD Express but it's also green as they offset all the carbon their vehicles produce. Guilt free delivery which we're very proud of...

    We guarantee you'll be happy with your order. But if you're not, please contact us so we can resolve. We are 100% here to help and will always do our best to resolve any issues - that's a promise.

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