Nute Burn? Pics included

So im starting my 5th week of flower on a 12/12 from seed grow. Ran into a problem yesterday.

The soil im using is fox farm ocean mix. I started half concentration nutes per gallon approx. 3 weeks old and showing sex. Then after a week (4th week) I started on full strength fox farm nutes (big bloom, tiger bloom) and have been using that formula for about 3 weeks now with great success. My box is very well ventilated so I seem to be watering about 1 quart per plant per day. I know that sounds like alot but i use a moisture meter and half way into the pot it reads dry the next day. Never are they wilting or anything. So the past two feedings i went by the fox farm schedule and added grow big into the mix. Then two days later i get this: (pictures below) So today i cut out the grow big and went with my regular mix. I didnt flush because It was only two feedings and the burn seems minimal. (plus I hear you can do more damage by flushing if its minimal that it does good) Ph out of my tap is like 7.5-7.8 so I know for a fact its not the ph. Let me know what you guys think.

-Edit- Oh yeah, I checked underside of leaves and no mites or spores of fungus. (does not wipe off)

Does anyone have any suggestions?

Im a newb but i would search up mg deficiency and see if its what ya got.

that ph is high for a soil grow.. you want like 6.5-7 i think. also, how often are you adding nutes to the water... you for sure shouldn't be feeding them daily.. not familiar with fox farm, but assume you shouldn't feed nutes more than once every week or two..

bzzzzzzzzzzzzzzzz wrong answer!! Ph out of my tap is like 7.5-7.8 so I know for a fact its not the ph. Let me know what you guys think.
wsph wet soil ph should read after watering and probe stands for 10 minutes to acclimate to the soil it should read 6.3-- 7 is the max prefer the acidic side. No food I would flush if you been feeding extra stuff in not Ok adjust Ph and stand back and behold the beauty of balance about 30 hours later

ok i know i dont have any repon this site but ff nutes are burn masters tiger bloom goes a long way i would go quarter strength on the tiger the big bloom on the other hand is the best nute they have although it is only a additive you can mix a couple table spoons to a gallon without fearing burn its the only real organic in there line up but with the grow big and tiger bloom which is the worst for burns its just crap imho sorry i had to learn to. i have a gallon thats been sitting for years lol just because its liquid fire but like i said quarter strength never go by factory schedules because they are way wrong unless you have a monster beast feeder indica i would suggest a different nute line up look around you will find some good suggestions i personly enjoy organics now very hard to burn same results burns can not show for a few weeks sometimes so i would stop the feeding and use ro water for the next week and a half maybe a half teaspoon of cal mag and a teaspoon of bb good luck brotha good vibes

ohh and always keep your solution around 7.0 dont want to go any higher than 7.5 ever and no low than 6.6 even this is low low you can run into problems fast i know its hard to do but you will get it down in no time bro onelung out good vibes

Check your PPM and PH......flush your plant and check again.............wait a few days till the plant begins to lighten a little and then feed 1tblspn of tigerbloom per gallon of water. Add 1tsp of epsom salts and some kinda micro nutrient..........if your using low levels of light feed accordingly. if your using a 400 or better then feed a little more like the above formula..........then go from there

How do i check the ph of my soil? I checked again and ph of my tap is 7.8 or higher. I have an R/O system so I mixed a gallong of R/O water and tap to get an even 6.8. Should i just flush the gallon through each plant pot, then check the runoff? I never had to do this before.

Take your 6.8 water add another 1/4 to 1/2 a tsp of ph down to get it around 6.5-6.4 and keep it there. Hydro you gotta drop it another full point repectively...........

tokinman said:

that ph is high for a soil grow.. you want like 6.5-7 i think. also, how often are you adding nutes to the water... you for sure shouldn't be feeding them daily.. not familiar with fox farm, but assume you shouldn't feed nutes more than once every week or two..

Click to expand...

No every other feeding.

SativaSam13365 said:

Take your 6.8 water add another 1/4 to 1/2 a tsp of ph down to get it around 6.5-6.4 and keep it there. Hydro you gotta drop it another full point repectively...........

Click to expand...

I dont have ph down, only the R/O system where the ph is 6.0 out of the spigot. But I heard you want to gradually bring down the ph of the soil right?

Go get some PH up then and scrap the tap water.....That way you use less ph..........only gotta knock it down a half a point.............

SativaSam13365 said:

Go get some PH up then and scrap the tap water.....That way you use less ph..........only gotta knock it down a half a point.............

Click to expand...

Ok I just ph'ed two gallons at 6.5. Do I run like two quarts per pot? they are three gallon pots.

well can u buy some ph up or down?? its only like 5 bucks at petsmart. its way easier then experimenting with ro and tap water. but a 6.8 will work but make sure to monitor it. and dont let it get too high. flush it till water runs out the bottom of the pot and let it drain till it stops dripping.

Do the fox farm nutes raise or lower the ph of the soil?

stonesour said:

Ok I just ph'ed two gallons at 6.5. Do I run like two quarts per pot? they are three gallon pots.

Click to expand...

NO to flush with 3 gallon pots you need to run 9 gallons of water thru them, just use you 6.0 straight RO water, you'll be fine

You have lock outs caused by salt build ups caused by improper watering
moisture meters are crap, and a quart in a 3 gallon pot is not near enough, you should be watering till you get PLENTY of run off

flush, wait and don't feed for at least 4 to 5 days

PS nutes tend to lower the ph of water

riddleme said:

NO to flush with 3 gallon pots you need to run 9 gallons of water thru them, just use you 6.0 straight RO water, you'll be fine

You have lock outs caused by salt build ups caused by improper watering
moisture meters are crap, and a quart in a 3 gallon pot is not near enough, you should be watering till you get PLENTY of run off

flush, wait and don't feed for at least 4 to 5 days

PS nutes tend to lower the ph of water

Click to expand...

just keep watering with the 6.5 ph'ed water for the next 4-5 days after the flush? I just tested my nute gallon mix and its wayyyy low. like in the 5's. My test wont go that low. How do you properly ph the nutrient solution or do you just water with ph'ed water after feedings? Should i do it tonight (lights are off) or wait till morning?

stonesour said:

just keep watering with the 6.5 ph'ed water for the next 4-5 days after the flush? I just tested my nute gallon mix and its wayyyy low. like in the 5's. My test wont go that low. How do you properly ph the nutrient solution or do you just water with ph'ed water after feedings?

Click to expand...

DO NOT water after the flush

Flush, then wait 4 to 5 days DOING NOTHING but watching

then report back with pic updates

if adding nutes to water lowers the ph too much you MUST bring it up
kinda why everyone says it's important

and I meant 9 gallons thru each pot, not spread out amongst them

if you have 4, 3 gallon pots then we are talking 36 gallons of water

I do mine in the kitchen sink