One of golf balls have been found at the bottom of David Roston . Golf balls found 100 yards from U.S. and 300 yards from the shore . Conservationists say the golf balls are not an environmental threat .
Thousands of golf balls have been found at the bottom of Loch Ness . Golf balls found 300 yards from beach and 100 yards from the shore . Conservationists say the golf balls are not an environmental threat .