Question: is hydrogen peroxide safe for aquarium plants?
Answer: It is therefore the perfect solution for use in the aquarium environment. Not only will it kill all pathogens and algae spores at a dilution of 1 part H202 to 150 parts water, but used in stronger concentrations of 1 part H202 to 10 parts water it is ideal for cleaning algae from glassware and ceramic diffusers.