It will depend on how many die in what volume of water. One or two in 50 gallons of water won't do much but 1 in a 10 gallon tank can cause a reading. It's always best to remove dead ones that don't get eaten within the first few hours. You want to get them out before they start to decay.just curious what others do when feeding ghost shrimp.Some die on the bottom and i don't want a spike in ammonia.scop most with a net.