Dymax Crystal CO2 Drop Checker Indicator Solution


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Usually ships in 1-2 business days from our fulfillment center
IMPORTANT: Returns are subject to approval and must be new, unused and in original packaging. Damaged returns are subject to restocking fees.

Size: 10ML bottle
Package does not include drop checker - Click here to view drop checkers.
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Dymax’s Crystal CO2 Drop Checker Indicator Solution makes monitoring CO2 levels in the planted aquarium quick and easy. Simply fill your CO2 drop checker of choice with indicator solution and CO2 levels will be displayed via changes in color. Blue indicates minimal levels of carbon dioxide while yellow tones signal levels that are typically too high with tones of green in the center that are typically favorable for a planted aquarium.

It should be noted that indicator fluid may take time to change and reflect levels so readings should not be taken following a water change or durings hours that CO2 is not being injected into the aquarium. The indicator fluid should be replaced every 4 to 6 weeks in order for the drop checker to work properly. Replace the fluid at the latest when it starts losing color and turns more transparent.

Shipping, Returns and Refunds
Live plants are shipped Monday - Friday for all west coast orders. For all remaining states, live plants will only be shipped Monday through Wednesday and Friday to ensure they arrive at your doorstep 100% healthy.

Rimless aquariums will be shipped throughout the week via UPS or Fedex Ground. For more information, please visit our FAQ page.

Hard goods can be returned up to 14 days after receipt of purchase. Buyer is responsible for return shipping.

Due to its nature, we are unable to accept returns for live plants. In the unlikely event you are unsatisfied in any way, please contact us ASAP. We provide 100% DOA (Dead On Arrival) protection.

To be eligible for a refund/store credit, please contact us within 12 hours of receiving it and provide a photo of the item in its original packaging.

No worries, we’ll take care of everything as long as it fits the guidelines above.

Most answers to general questions can be found on our FAQ page.
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