Blumats in 10-15 gallon coco, salt buildup?

[Heavy1]

With jack's hydro mix thru Blumats into 10 and 15 gal 100% coco fabric pots I'm starting to see rings of salt at the bottom of pots about 2-3 inches tall. Week 3 flower. How worried should I be about salt buildup, been running full strength, ~900-1000ppm, in flower. Constantly damp, but no flushes.

 

[prune]

Only one way to know for sure, run through 5-10 gallons of half strength nutes and ph/tds what comes out.
If things are going south you'll notice that the run-off is more acidic and substantially higher in EC than what you've been using as a nutrient solution.
If that's the case, flush till the values please, than top off with full strength nutes to set the table. Note that if you have had an EC surplus, you've been over doing it and need to cut back or better balance your standard input...

 

[Heavy1]

I watered by hand half strength until I got a few gallons of runoff going through, and checked against feed: I feed 5.9-6.1 into blumats' res at 900ppm, runoff was 6.1 and 3200ppm. I'm moving on to flushing and resetting with full strength.



Might lower my ppm to 600-700 for future feedings?

 

[Heavy1]

I am tempted to just lower my feed strength to 1/4-1/2 and let the plants eat away the the extra ppm? Will that work out like that?

 

[PurplePotion]

If they aren’t already burning it could work. In the future try not to go above 1.4EC with Blumats, you can usually get away with even less.

 

[Heavy1]

A couple do have a few leaves with what I suspect is nutrient burn...mostly near areas that definitely got a little wind burn, they're mostly on the under edge of the canopy where light is lower. I'm going to try to bring down the pmm to 400-500 and run it a little extra damp for a day or two, then test again.