Liquid CO2 by product?

FishFanMan

AC Members
Jun 13, 2013
691
0
16
Naperville, IL
I've been daily dosing API CO2 booster now for over 2 weeks and my plants are growing well and algae seems to be better controlled. But I have noticed significantly more clear film floating on the water surface. Is this a breakdown product of the glut?
 
I've been adding glut to my planted 10 and 55g for months. Started with API, now use another, but never noticed a film. very little surface agitation on either tank.
 
Maybe it's residue from the algae that it's killing. I remove it with paper towel for the time being.
 
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