Posted 06 August 2017 - 09:25 PM
That will boost the pH - so still use with caution....
Personally, I'd use a minimum amount and increase the dose rate each 2nd day for the same batch of peroxide until you get the results you are after. (Heavy aeration will also help reduce the oxygen levels if too high).
The general dose rate for 50% peroxide is 3ml of solution per 100Litres of aquarium.
Peroxide loses its %'age over time - so start with the initial dose and increase it by a small margin every few days until you notice a suitable result... then continue with that dose rate until the bottle is empty..... start from the original dose rate with a new bottle.