its a 15 litre tank and i have to take them out because my tank is at work. i leave the fish at my desk in the container, and clean / remove more water in the bathrooms at work. its a health and safety issue at work.
anyhoo- i found the fish (alive!)
somehow, and i have no idea how on earth this happened...
i have a biorb tank, and the filter / air pump is all in the one unit, which can be removed / replaced all at once without disturbing the fish.. it has carbon peices in the bottom of the cartridge and sponge filter material in the top half, and then the tube where the air flows up into the tank.
i put the filter / bubble tube into the tank first, then put all the fish into the tank.
then turned the bubbles on.
anyway... last night when leaving work, i turned the bubbles off so i could feed them all.. and i saw the fish was stuck inside the filter / bubble area.. trapped between the plastic and the foam underneath.... no idea how it got there,
but i managed to get him out safe and he swam off fine! joined the other group.