DWC water help FAST PLZ

i have a DWC (bubble bucket) that is in its 1st week of flowering, and the problem im having is the water in the bucket has something floating in it A LOT of something! it looks like lil bitty white specks mainly around the roots,when i lift the plant up and the roots move i see alot of the white stuff come off the roots ,and it settles in the bottom of the bucket? this was never a problem in the veg stage, i did a complete water change when i noticed the 1st time , and the next night it was right back, the plant shows no signs of stress really maybe 1 or 2 fan leaves with 1/4 inch of tip curl,the roots have a very small hint of beige in them, but no slime, and this only started when i changed my nutes to flowering strength , i use Humbolt Co. Grow,micro,bloom & honey, also silaca blast(for high stress) and magi-cal,and ph-down . my ph is normaly 6.0...any help would be appreciated

man 40+ ppl read this and nobodys ever had this problem ? or ever heard of it? i dont want my baby to die plz somebody inform me

You say your ph is normally 6.0. How often are you checking it as ph in bubblers can be way unstable and you may need to be checking it on a more regular basis ?

Look at your PH down!!! I noticed the two times i ever used mine it left some crap floating around. When i inspected the bottle which says to shake well, it was in there.

thk u guys so much for replying! Nexus i check ph at least 3 times a day every day like clockwork.and Jack i shake all my nute pretty good before i mix , but i'll make sure i really shake my ph down now thx, and i added 15ml of h2o2 to 4gall of water last night during sleepy time , noticed some healty roots growing at root ends,and is it ok if my water lvl is about 1" away from the bottom of the net pot?the roots are almost to the bottom of the 5gall bucket? just asking and agin thk u guys for responding!!!

I dunno if shaking helps tho, becuase its a solid that sits at the bottom of the bottle, I know i shook mine like hell and it didnt dissolve, Its an old bottle tho, just see if there is a precipitate at the bottom of the bottle, it should look milky. Nothing u can do about it but now u will kno where its coming from. I never use PH down, if im ever low i just add more water to the res. the general rool for dwc is to have the water level at the point where the bubbles will pop and hit the medium/net pot. U want the better part of your net pot damp, this will keep the root ball happy.

Thx alot man, so no need to worry ? plants looks healty as shit! its my 1st DWC so its a learning experenice lol,i use tap water witch is 8.2ph so my hands are tied as far as using ph down unless theres another way to bring down the ph with out hurting the plant?