Cories lay eggs singly, stuck to leaves, rocks, etc. Cardinals and neons
require very soft acidic water to spawn, otos rarely or never spawn in
captivity. Danio, rasbora, and white cloud eggs sink. I'm not sure about
hatchetfish, so that leaves them and the snail.

Limnophile

"John Thomas" wrote in message ...
Crime scene:
Someone's been very happy lately and laying many sacks of eggs about the
aquarium.