
Originally Posted by
tetrakid
Sometimes, oil can also get to the water from our hands. No matter how clean our hands are, it must be washed with detergent before we touch the tank water, especially after eating Changki curry puff or Kentaki, etc. Even a tiny layer of oil is enough to insulate oxygen from the water.
Surface skimmer is overkill for fresh water tanks. That's more for marine tanks. It is much better to eliminate the cause of the oily surface. That is why I go all out to ensure my water surface is tip-top and dancing all the time. Not just moving, but also make sure the air pushes itself all over the tank surface thereby spreading oxygen-rich water to the other parts. Oxygen is life. Oxygen is top priority in fish-keeping.
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