DENNERLE Nano Bio CO2 Water Care Treatment Set, 12.6-oz bottle -

Dennerle Nano Bio CO2 Water Care Treatment Set, 12.6-oz bottle

By Dennerle
Rated 1 out of 5 stars
$24.28Chewy Price
$26.00Chewy Price

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About This Item


  • CO2 fertilization gel.
  • Great for freshwater plant aquascapes.
  • Designed to produce over 300,000 bubbles.
  • Crafted for nano aquariums up to 20 gallons in size.
  • Includes a bubble counter, filter adapter and tubing.

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Questions & Answers

5 Customer Questions

Does Chewy sell the Bioline replacement bottle?
Answer by ChewyNov 17, 2021
At this time, replacement bottles are not available for this set.

Does this run all the time? Will it hurt the fish or will i need to supply a air stone for extra oxygen?
Answer by ChewyNov 15, 2021
This treatment is based on alcoholic fermentation, always runs, and must not be provided with a backflow protection or a solenoid valve. If the Bio CO2 Set is selected to match the size of the aquarium, there is no risk to fish or all other inhabitants in the aquarium at any time. Ventilation with a pump should not be used as the CO2 is completely driven out with this action. Plants grow significantly better with CO2 fertilization and thus ensure the oxygen supply.

I already have the Dennerle corner filter, if I purchase this does it come with the part that the green tube attaches to for my filter ? And how do you refill after 30 days?
Answer by ChewyAug 04, 2021
This treatment set comes with Bio-Line CO2 bottle complete, 7 cm hose, 75 cm hose, BIO CO2 holder box, CO2 injector, and bubble counter. To fill up, simply replace the Bio-Line CO2 bottle complete with a new one when it no longer produces CO2.

Is this set beneficial for shrimp in a planted tank
Answer by ChewyNov 11, 2021
The Dennerle Bio CO2 Set is a CO2 fertilizer based on alcoholic fermentation. There is a huge benefit for the plants as carbon is the most important nutrient. The Bio CO2 concept is a perfect choice for beginners and smaller tanks. It is safe for shrimp and all other inhabitants in the tank.

ReviewsWrite a Review

Rated 1 out of 5 stars
1 Ratings

1 Customer Reviews

Rated 1 out of 5 stars
By Trey on Dec 5, 2021

Waste of Money

Tried two bottles. Followed directions and waited two weeks. Simply a waste of time and money.