I've found articles on green slime, red slime, blue-green slime but nothing on
a clear type of slime which has occasionally shown up in two of my tanks. I
can reduce it with consecutivel water changes but this doesn't appear to ensure
that it won't reappear. The fishvet.com site advertises a product to eliminate
"slime" but I'm not really sure what the clear mucous material I occasional see
is. Can anyone identify it?

Thanks in advance,