sera CO2-Tabs plus sera CO2-Tabs plus 20 pcs

sera CO2-Tabs plus are compact, slow-dissolving tablets formulated to supply a steady source of carbon dioxide for freshwater aquariums. Each pack contains 20 tablets designed to release CO2 gradually, supporting photosynthesis and promoting healthy, vigorous growth of aquatic plants. The product is intended for planted aquaria where controlled and reliable carbon supplementation improves plant color, growth rate and overall tank stability.

Advantages

These tablets provide a consistent CO2 release without the need for complex pressurized systems, making them suitable for aquarists seeking a low-maintenance carbon source. Their slow dissolution profile helps maintain more stable CO2 levels compared with single-use, fast-dissolving additives. The tablets are calibrated for aquarium use and integrate easily into routine maintenance schedules.

Suitable for

• Freshwater planted aquariums requiring supplemental CO2
• Small to medium-sized tanks where pressurized CO2 systems are impractical
• Hobbyists looking for an easy-to-dose carbon source to improve plant growth
• Temporary CO2 supplementation during plant propagation or recovery

Key specifications

• Form: slow-dissolving effervescent tablets
• Quantity: 20 tablets per pack
• Intended use: supplemental carbon dioxide for freshwater planted aquaria
• Delivery: gradual CO2 release to support photosynthesis
• Compatibility: suitable for typical aquarium water parameters used in planted tanks

How to use

Place one tablet directly into the aquarium water according to tank size and plant density; observe the tablet as it dissolves and follow routine water monitoring to assess CO2 effect. Replace tablets at intervals consistent with dissolution time and observed plant response. Do not exceed the recommended frequency for your aquarium size; combine with appropriate lighting and nutrient dosing for balanced plant growth.

Usage recommendations

Use sera CO2-Tabs plus as part of an integrated plant care routine: monitor plant appearance, adjust dosing frequency to avoid CO2 fluctuations, maintain adequate fertilization and lighting, and ensure regular water testing to keep parameters within safe ranges for fish and plants.