The plant is lacking any nutrients should I take precautions?

What you've got here is a calcium deficiency and it's pretty typical to develop this as the plant goes into flower. One thing you need to do is to cut back on your BioGrow - too much nitrogen will create a lockout and the plant won't be able to get to the calcium that is normally contained in the nutes. You can choose to do one of two things here... you can flush your plant with pH'd water that is 3x the pot volume (you're growing in about a 4 gallon pot so that means you'd need to run 12 gallons of pH'd water through each)... at the end of the flush, you can give it some nutes but cut the BioGrow down to 1/4 of what you've been giving and the rest cut to 1/2... and add in a dose of calmag. After they dry out, you can water again and then resume your normal nute amount BUT do not give more than 1/2 strength BioGrow or you'll end up with a lockout again. The other way to do this is to give only pH'd water for the next week - clean out the nutes/salts that way... next week, resume feeding but again cut the BioGrow to 1/2 of what you've been giving and add in some calmag once a week. I personally wouldn't recommend this as it will take a while to correct the problem and the damage will be ongoing while you slowly get the plant free of the lockout... but it's your call. This is also the time that other deficiencies can start to pop up - so if you want to get on a preventative course, get a good PK booster and start feeding that to them as well... flowering requires a large amount of potassium and phosphorus and this is the perfect time to start getting those nutes into the plant. Good luck!