Originally Posted by livebearerlove
Every other day? That seems so high.
I was putting it in an eye dropper, and added one drop every other day.
I have noticed some 'bubbles' at the top of the tank. I have a fluval edge (with the glass top). and the extra bubbles are annoying. Could the excel be causing this?
How do you know when you are overdosing?
One drop is usually estimated to be about 100 microlitres (of course, this depends on drop size, but it is a rough estimate).
You are nowhere near the recommended dosage of Excel. In addition, you should be adding it daily.
The bubbles that you are noticing at the top of your water surface are not due to Excel; perhaps you have a protein scum forming, which is allowing the bubbles to persist?