theotheragentm
Fish Herder
What are your water stats? When was the last time you did a water change? Fish dying is never a good sign.
What size is the tank and what is in it as far as fish and decorations go? Shells are not good for decoration as they slowly leech into the water and raise pH. Unless you have Cichlids, I wouldn't be using shells for decoration.
Are you sure the missing Guppy didn't make a leap out of the tank? Fish can jump out of tiny holes in the tank pretty easily. It's quite common. Take a look around the tank just in case. Unless you have predatory fish, the Guppy was not eaten while alive. It died of something else and then was an opportune snack for one of the fish most likely. If you have a Pleco in the tank, the other Guppy may not have been crushed by the shell but instead ended up there after dying as Plecos kick up a lot of substrate pretty easily.
What kind of plants are you trying to keep? What kind of lighting is in the tank? Live plants are a whole other story, requiring lighting, CO2, and various fertizliers and minerals. Depending on the plants you have, it's a whole other mess to deal with on top of the fish.
What size is the tank and what is in it as far as fish and decorations go? Shells are not good for decoration as they slowly leech into the water and raise pH. Unless you have Cichlids, I wouldn't be using shells for decoration.
Are you sure the missing Guppy didn't make a leap out of the tank? Fish can jump out of tiny holes in the tank pretty easily. It's quite common. Take a look around the tank just in case. Unless you have predatory fish, the Guppy was not eaten while alive. It died of something else and then was an opportune snack for one of the fish most likely. If you have a Pleco in the tank, the other Guppy may not have been crushed by the shell but instead ended up there after dying as Plecos kick up a lot of substrate pretty easily.
What kind of plants are you trying to keep? What kind of lighting is in the tank? Live plants are a whole other story, requiring lighting, CO2, and various fertizliers and minerals. Depending on the plants you have, it's a whole other mess to deal with on top of the fish.