newly born guppy fry(just 1 day old and two of them) died when i put two of them in a bottle cap filled with fresh water directly from the tap water(filtered tap water).I drop one-two drops of safe guard tap water dechlorinator and vitamins into the bottle cap fill with tap water and place those guppy fry in there.The reason is because previously i drop some liquifry food for them in a normal small fish tank, they seems to dart away from the food and ignored it.So i guess putting it in a bottle cap would makes it easier for them to eat the food rather of swimming away(because the bottle cap is really small,the size is those normal 100+ softdrink caps). But they died 2 hours later...