That's ingenious. Thinking about it, I might try running some tipex into one of mine and letting it set on its side, that should give a nice white background. It better work, guess there wouldn't be any getting it out again!
|DIY Barr's venturi design reactor build||Carbon Dioxide (CO2)||42|
|V||Colour of drop checker?||Carbon Dioxide (CO2)||5|
|Where can i get a big bottle of drop checker solution??||Carbon Dioxide (CO2)||18|
|Which drop checker would you trust?||Carbon Dioxide (CO2)||29|
|W||ph drop during co2 injection||Carbon Dioxide (CO2)||22|
|W||co2 drop checker colour||Carbon Dioxide (CO2)||10|