My aloe vera seems to have some kind of pest and or disease. Small back specs have appeared on the leaves, and a lot of them are turning brown and dying. I've had Aloe Forever Vera gel First Botany Aloe vera gel from 100 percent Pure Aloe Infused with Tea Tree Oil Forever Aloe Vera Juice 99.7% Pure Inner Leaf Gel for Digestion & Immunity Forever Aloe Shop Organic Aloe Vera Juice, 500 ml Life Light VitalAbo Online Shop Europe Topper 100% memory foam sfoderabile 140x200