Sorry it took some time to get to your Schefflera problem, and unfortunately its hard to say. It looks like it could be a number of different things from nutrient deficiency, leaf spot fungus, or a virus. I’ve included a couple of links that might help you. It also looks like the plant may be in a pot too small for it? If you don’t fertilize the plant, you can try that (although the affected leaves may not recover, you may avoid further issues); however don’t over-fertilize! A general tropical or houseplant fertilizer should be fine, and follow the label directions. Make sure you are not watering over-head with very cold or warm water. http://ohioline.osu.edu/hyg-fact/3000/3068.html AND http://www.clemson.edu/extension/hgic/pests/plant_pests/indoor/hgic2251.html
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Thank you!! I’ve tried doing all the right things. Only watering it when its dry an inch from the top, turning it every day, itbseems very tight together at the top. I don’t know if I should cut the dying leaf stem off. If I re pot it should I soak the roots first or just add more soil?? Lesley