Depending on how much more you are trying to push her will be the basis of the decision you will have to make.
If your plan is to harvest soon, then I would not worry much at all about this and actually begin your flushing process by using straight pHed water. Typically your girl will start turning all kinds of colors during this process.
If you have a few more weeks you could defiantly mix up a batch of nutrients to Fox Farms recommended dose, but do nearly double the water to have about 40% run out. If there was any issue in the soil this will help correct it and flush new though your soil. If you are running (example) EC 1.2 in your nutrient solution. You should have 1.2 EC in your run off, if it is higher then you had a build up of salts in your soil.
Hope this helps and amazing grow my friend.