1. jaypeecee

    Does Ferrous Gluconate Cause A Water Surface Film?

    Hi Folks, Whenever I use Seachem Flourish 'Comprehensive' or Flourish Iron, an oily film develops on the surface of the water. Both these products contain ferrous gluconate. Is it reasonable to conclude that ferrous gluconate may be causing the surface film that I am seeing? I will add that...
  2. jaypeecee

    Drop Checker Blocked By White Film

    Hi Folks, My new glass conventional drop checker is giving misleading readings. And I have good reason to believe that it's being caused by a white film that builds up near to the DC entrance. In other words where the CO2 gas diffuses from the water surface to the airspace inside the DC. See...