I've got somethign I've never seen before. I havea "new" (about 2 months
old) 125 lightly planted tank, witha variety of fish in it. After the
initial cycling, the chemistry had setteld down to a pretty "normal"
ballance, and was staying nice and constant (light presence of nitrates, no
ammonia, teeny bit of nitrite).
Then, overnight, *everything* went to zero - none of the test kits show the
presence of any nitrate, ammonia, or nitrite. I've never had to add any
suplements to any of my other tanks, (similar set ups), and I've always (and
still do, so the test kits are OK) had traces showing up......

any ideas?

thansk
--JD