I posted yesterday about a possible bacteria bloom, which I then later attributed to my co2 bottle falling over and getting the liquid in the water. Did a big water change, water was less cloudy, thought everythings ok. This morning, water is really cloudy, and all 6 tetras and 1 loach (that I've found so far) are dead! Along with 2 dwarf frogs who got stuck in the snail trap, of course w/out any snails!! Any idea what has happened? This tank has been running relatively problem free for months now, I'm worried about the guppies...