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Aquarium CO2 Drop Checker Solution 15ml

4.9 [42 Reviews]
£4.99
CO2 Drop Checker Solution 15ml
 
 

Key Facts

  • Accurately monitor the CO2 levels of your aquarium.
  • Easy to use 15ml dropper bottle.
  • Pre-made mix of 4dKH solution and drop check indicator.
 

Description

This test solution is added directly to a CO2 Drop Checker.  Over a period of a few hours the colour of the solution changes to indicate the concentration of CO2 in the water at the time; blue indicates a lack of CO2, yellow indicates too much CO2, and green indicates the desired level of CO2. Depending on the colour of the drop checker you can adjust your CO2 dose until the desired level of CO2 is reached.

The solution comes in a handy 15ml dropper bottle for easy deployment into the drop checker.

Instructions

  • Empty existing indicator solution from drop checker.
  • Fill drop checker with solution until the chamber is 2/3 full.
  • Position the drop checker in the aquarium so it is visible, but such that CO2 bubbles from your diffuser do not easily enter the drop checker, which could result in inaccurate reading.
  • Wait at least 6 hours for colour to accurately reflect the CO2 levels in the aquarium.
  • Adjust CO2 dosing in accordance to drop checker colour:
  • If the colour of the solution is yellow it indicates too much CO2 is present - reduce your CO2 dosing.
  • If the colour of the solution is blue increase CO2 dose in small increments.
  • If the colour is a light green you have the correct CO2 dosing.
 

Customer Reviews

Average Rating
4.9
  • J
    Jacqueline M.
    5
    2nd Mar 2025
    Works a treat. No issues at all. Works a treat. No issues at all.
  • A
    Arthur S.
    5
    1st Mar 2025
    Great product, super easy to use right out of the bottle! Changes color quickly to show CO2 levels, and the delivery was impressively fast too. Great product, super easy to use right out of the bottle! Changes color quickly to show CO2 levels, and the delivery was impressively fast too.
  • S
    Stuart B.
    5
    21st Feb 2025
    Awesome solution, no mixing needed! Changes colour fast based on CO2 levels Awesome solution, no mixing needed! Changes colour fast based on CO2 levels
  • A
    Alvin K.
    5
    25th Jan 2025
    Easy to use and really reliable. Fast delivery. Easy to use and really reliable. Fast delivery.
  • A
    Allan S.
    5
    14th Jan 2025
    Super easy to use with no mixing hassle, and the color change is spot-on for monitoring CO2 levels. Delivered super fast. Super easy to use with no mixing hassle, and the color change is spot-on for monitoring CO2 levels. Delivered super fast.
  • P
    Paul D.
    5
    26th Nov 2024
    Works wells and a fair price Works wells and a fair price
  • D
    Dimitar R.
    5
    1st Nov 2024
    The solution is easy to use, no mixing needed and it responds quickly. Delivery was speedy. Couldn't ask for more! The solution is easy to use, no mixing needed and it responds quickly. Delivery was speedy. Couldn't ask for more!
  • D
    David W.
    5
    27th Oct 2024
    The color change is clear and quick, so you know exactly what's going on in your tank. No hassle with mixing, just drop it in and you're good to go. The color change is clear and quick, so you know exactly what's going on in your tank. No hassle with mixing, just drop it in and you're good to go.
  • B
    Bill J.
    5
    12th May 2024
    Good product good price. Good product good price.
  • M
    Mary M.
    5
    6th Apr 2024
    Easy to use and really quick delivery. Highly recommend Easy to use and really quick delivery. Highly recommend
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