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Well man has the nute burn got any worse?.. If not then i would not worrie about watering them again. Are they in pots or are they in tha ground?..
OK to answer your ? no you do not need to change nutes those are pretty good ones. But the first time you ever feed your plants with nutes start out with 1/4 the strength of the recommended amount. If there are no signs of nute burn then the next feeding move up to 1/2 strength.
If there are still no signs of nute burn after that when its time for the next feeding give them a full strength dose. If they are still growing good with no sign of nute burn afer that then you can continue feeding them with full strength nutes. good luck man i hope this helps :thumbsup::thumbsup::jointsmile:
Oh i almost forgot if you wanna play it safe you can feed them at least 2 times a 1/4 strength before moving up to 1/2 strength. Once you move up to 1/2 strength just repeat the same thing as you did before untill you get to a full strength dose.
listen to the stickyman hes right, 1/4 strength is the place to start, but dnt re water it wont wash out the nutes it will just reactivate the nutes you put in, all u can is wait for the plant to use them up i.e when the soil is dry then just add plain water then start ur nute process agen at 1/4 strength...:jointsmile:
one more thing FF big bloom is for when the plant is blooming not vegetative, it will be high in nutrients needed for flower and low in nitrogen needed to veg, try get ur hands on sum nutes with a high nitrogen value...:jointsmile: