The cacti are normally indoors but I've decided to leave these cacti, along with a cinnamon cactus, outdoors since the forecast is expected to be around 90º and sunny. I won't be watering them any time soon as I'm concerned that watering may have caused the issue. I'm very new to owning cacti, so I'...

A cactus of mine appears to be sick. I am not sure what species it is. The extremity is losing green skin and there is a tiny section towards the bottom of the cactus that is also losing skin. The cactus is pretty soft on the extremity but it is new and from what I've seen it has never been tough or...