Left plugged in constantly, the light typically costs just pence per day to run.
Don't have a baby bi Orb? The intelligent
They have a soft side for gentle cleaning & a rough side for tougher algae deposits.
...Enables the heater to be safely fitted to the acrylic surface of your bi Orb.
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Along with the sachets of treatment supplied it will remove the algae which causes green water. Follow the simple step by step instructions supplied to remove the algae & clear your bi Orb water.
This is a treatment cartridge, it does not prevent green water. The best way to prevent green water is to minimise feeding & carry out regular maintenance.