Chinadian wrote:

But I also found worms on stones and under stones:
like ant long, but like 3 hair thin.. I could not catch them. They
come out once a while and my fishes don't eat them.

Have a close look at the worms (with a magnifying glass): Do they have a
triangular shaped head with "ears", and 2 eyes that look cross-eyed? If
so they are planaria, relatively harmless but bad-tasting, so fishes
don't eat them. Feed less and get some gravel-cleaning fishes to reduce
their food supply.

Here is the urgent story: Suddently I found so many so many eggs on
the inner glass on my tank. I breeded goldfrish before. They look like
eggs. But zebra's eggs should fall not hold on glass-- those eggs are
not fully and firmly attached to glass, but move along water movement.
Platies do not shoot eggs... They are hundreds of those eggs. Most are
White transparent, with some with red-brown thing inside. The
red-brown is moving!!!! They are coming out. But I don't want to see
if so many worms or snails coming out. If they are zebras, then they
are great. But I am really afraid, because 1 they are on glass.

Again it is probably worthwhile to have a close look at the eggs and try
to identify what is moving inside. A stereo microscope is ideal, you
could approach a local microscopy society or biology teachers. In snail
eggs you actually se little snails (even with shell), similarly in fish
eggs there should be a little fish inside.