water is yellow, over it there is a brown to black precipitate turning water to black during the operation...
it apear to not interfere on the gas production.... but who knows...
i believe that the most reasonable way to know if our electrolysis is working at higher efficiency is automating the calculation of power going into the cell
the input impedance will give very useful information and we must pay attention at the temperature change as the conductivity is a function of the temperature
there is two powers being dissipated one is heat so a temperature reading versus the amount of water in the tank will tell how much energy became heat
and the second is gas generation and the only way i see to determine it with exact result is to use a semi analytical scale.. .a precision of 1mg.. other than using flow meters (they could be calibrated and a rapid indicator..)
there is a heat flow sensor that can be used to than ignite the gas and even verify if the power output is greater than the input by heating some water in a separate tank and calculating how much heat went in..
https://huksefluxbrasil.com.br/produto-servico/open/sensores-de-fluxo-de-calor/?gclid=EAIaIQobChMIvuyp8oTb3wIVBAaRCh05WAMfEAAYASAAEgIyavD_BwEmy cell is consuming some water visibly.. today i consumed like 10ml during tests... my impression is that i should have needed more amps to have this result..