Yes it's pretty normal for new foliage to be a lighter green than the older already established leaves.... It's when the new growth is yellow that you have a problem.... Leaf tips turn yellow sometime because of over fert signs or nitrogen is being released from the leaf.... If you know you aren't over ferting, could be a natural plant process... My point is don't over worry because the tips of the leaves aren't green.... As long as your plant isn't turning yellow or wilting over, you'll be fine:thumbsup:....

CGI::::::