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[APD] Has the cause of surface scum been found?
Well I tried it out, this weird idea of mine and it was night and day.
I cannot say it's true for every case but it is true for this case and many
others I've played with over the years and I believe....that it can be
generalized to one of the main primary causes for surface scum in planted
General good plant growth produces clean surface waters. Lowering the CO2
level below optimal levels of 20ppm+ etc produced large amounts of surface
scum layer. It seems that when plants are stressed for CO2, either from a
temporary or also perhaps a chronic lowering of CO2, that they produce/leak
out lipids and/or proteins.
The scum also dissipates quickly when CO2 levels are returned to 20+ppm and
hence O2 levels are returned to that of a normal thriving planted tank.
Whether the production stops of the lipid/protein leakage from the plants or
if the higher O2 levels dissolve the scum layer, I'm not certain.
But I can certainly correlated high CO2 with less surface scum.
Does anyone know of any analysis done of this scum layer in a planted tank?
It seems that the plants leak this scum out but it might be something else.
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