I have not yet seen any commentary on the use of H2O2 (hydrogen peroxide).
I use 35 % diluted 11 times to get 3 % then add it at a rate of 3 ml per lt.
I also use an air
pump.
H2O2 at 35 % is needed because the 3 % may have stablizers and not be food grade and breaks down faster.
I am in Calgary and I am looking for an EC/CF meter with TDS and PH all in one. PM me...