Since you are using 5 gal DWC buckets I would toss the mixture and start over and double check your measurements before you add it. ALSO, just because you have a 5 gal bucket doesn't mean there is 5 gallons of water in there. Remember, deduct the 25 PPM of your water and check the PPM right after you add the nutes but BEFORE you add the PH down or up which ever you have to adjust.
I have 7 5gallon buckets connected and flowing together. I mix up 30 gallons of nutes at a time for a system change. I'm not that worried about it. I mixed up a batch and the ppms are like 150-200 over what Corey said they should be but the plantations seem to be ok so ill see if it works out the same way on my next res change. I dont really wanna waste 30 gallons of nutes.