Help! Mid flower nute probs

Hey guys. Im running 1 600w and 1 1000w over 15 plants in Roots Organic soilless mix in 5 gallon buckets and i hand water every 2-3 days. Ive been using 1/3 strength nutes the whole grow. Sunday will be the 1st day of my 4th week of flower. All of a sudden some leaves started looking like they have a calcium def. I gave them some CalMg 3 days ago and they have gotten 3 times worse. I switched to straight water. Im using Age Old Bloom, Fox Farm Beastie Blooms and General Organics CalMg. Any idea whats going on here?? Since im in a soil type of grow i dont really watch my ph (i know, i know but im getting a ph/ec meter tomorrow). Is this nute burn or a deficiency??

that looks like a deficiency to me mate or nute lock up

Is your ph ok ?

I`d be looking at cal/mag, iron and maybe boron ? do you have a micro nute feed ?

I was thinking nute lock out... Not sure on ph till i get a meter tomorrow since im switching to a drain to waste setup next time. I dont use micro right now. Ive been using bloom, beastie blooms and calmg during flowering. Im super broke atm and im hoping i wont have to buy anymore nutes since im switching to straight coco next time and going to be using Canna nutes.

Beastie bloom ? Like the 0-30-50 salts. If so your ph is going to be low and locking out. I would try something more balanced when you can afford. High P doesn't really increase anything. I prefer something with micros. Like organic big bloom. Fish emulsions or a more balanced bottle nuet. I don't know anything about Canna. But I'd the p and k are insanely high stay away. IMO good luck. Try fresh water to get rid of salts and restore ph you should e good. Also cal mg is only 100% needed with ROed water.

Yes the 0-50-30 Beastie Bloom salts. Hopefully i can see my ph tomorrow when i get my meter. Ill try to pick up a small thing of micro. Ive heard nothing but amazing things about Canna coco nutes. Supposedly the best on the market for coco and i hear their "Boost" nute is badass. My water isnt RO'ed but i really wish it was. Is it necessary to have RO'ed water if im running hydro/coco? I have a well but i have a whole house filter that the water goes through, but within 2 months the filter is almost black. Though i just had a crop that i used the SAME nutes and SAME water on and it turned out fine. Though i was using soil last time, not soilless coco mix.

Vostok, this stuff is LOADED with perlite. Its seriously like 30% perlite

Its gonna be a giant pain in the ass to move all these plants out and flush them all, but im gonna do it like in your tutorial.

I just tested my water today. It has a ppm of 340 and ph of like 8.4. Jesus how did i not get this meter before? Its a wonder any of my grows have ever turned out worth a shit!