Oh... plus a deficiency would show over a much longer period of time.
Did you spray them with anything yesterday? Did you feed them in the last few days?
I use a regular Neem Oil program. Works great, and I grow in a relative jungle with some serious buggins out to get my babies.
Mix 3 tsp Neem Oil with 1 tsp dish soap and 1 gal of water. The soap is there as an emulsifier.
Spray liberally over all the leaves top and bottom (very important to hit...
Perhaps the bottom nugs grow slower and the brown pistols are from some of the original growth. Perhaps you notice the brown pistols more on the bottom because those nugs are not so full of other/fresher pistols.
.... perhaps.
I tie my from the top of my growing chamber.... but that's a very handy answer for my specific setup.
At any rate... you have a good problem my friend. I'm sure most growers would tell you that they don't shed too many tears when their plants get heavy with buds.
A fan will help them next...
River water could be fine... but could be very bad too. Many minerals are disolved into the water as it winds it's way to your garden and those minerals may or may not be good for your babies.
Here's a test.... are you willing to use that same water and drinking water? If so, I might consider...
History is mighty long my friend... and you've only been here to witness the smallest of historical slivers. Religions come and go but humanity remains. The gods the your distant prodigy will worship may be VERY different than the ones currently available. If you were to choose a diety on...
Really... the question should be directed back at you.
Rule of thumb... they'll double in height. Are they 1/2 the finished height you're shooting for? Will they fit in your grow chamber when they're done?
You get the idea.
The bigger they are before you veg, the bigger your buds will be...
Sorry... forgot to give any actual advice....
Flush the crap out of them. Lots of fresh water... maybe even a flushing agent like Clearex. Your soil has too much nutrients in it and you need to try to get some of it out of the soil.
It will take them forever to recover.