CO2 refill set ARKA mySCAPE Refiller 800 g (2x400 g) DIY CO₂ solution with citric acid & baking soda easy dosing long lasting for planted aquariums safe efficient aquascaping

Complete CO2 refill kit with 2×400 g powder – includes citric acid (A) & sodium bicarbonate (B) – reliable CO2 source for planted tanks & aquascaping – no cylinder or pressurised gas required. Highly efficient & safe – supports stable plant growth, strong colours & oxygen levels – perfect for CO2-demanding aquariums & DIY enthusiasts – ideal for regular or beginner dosing. Compatible with all refillable CO2 systems – perfectly fits ARKA mySCAPE CO2 setups – also suitable for many standard DIY kits – effective alternative to costly cartridges or pressurised tanks. Convenient 2-chamber format – resealable & moisture-resistant – each kit provides multiple CO2 cycles – clean dosing with no mess – for home aquaria, shrimp tanks & nano setups. Trusted ARKA quality – popular with aquascapers & plant keepers – safe formula with clean ingredients – can also be used in household descaling & odour neutralisation if needed.