"jd" wrote in message
...
here's one I can't figure out. After I do a water change, the leaves of
all my plants are covered with little tiny air bubbles for about a day.
The water chemistry is a very close match to my tap water (well water).
The plants are in laterite inder a layer of gravel..... Does anyone have
any idea why this would be happening, and if I should be worried or not...

thanks
-JKD

Your plants are happy (Pearling - giving off O2). I've read a few
explanations for this, most common being that the CO2 in the water provides
a missing nutrient. Plants always give off some O2, but unless the water is
saturated you normally can't see it. So it's also possible that the tap
water is saturated with O2, allowing you to see the O2 being given off by
your plants. Third possibility is that the tap water provides some other
nutrient that your plants are missing, allowing them to produce more O2.

Either way it's a good thing, but also a sign of a possible missing
nutrient. My high light, CO2 injected tank will Pearl without doing water
changes.