Pests or deficiency?

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Hi all! Second indoor grow and looking for some help diagnosing whether I have a problem. I’m running fastbuds strawberry and lemon pie auto. They are in biobizz light mix and using biobizz nutrients with filtered filtered water initial ppm of about 50. Ph is 6.0. Day 28 and they are looking good but I have some sports I’m concerned about. More details laid out below.

Problem: yellow spots to leaves

Medium/grow method: biobizz light mix soil. Indoor under LED

Feed: and supplements used: biobizz nutrients

water source: bottled spring water

Strain/age: FastBuds strawberry auto pie and FastBuds Lemon Pie auto

light used: viparspectra xs2000 full spectrum LED

Climate: indoors. Daytime temps 78-79 Fahrenheit. Night 68-69

Additional info: I have been using a humidifier so RH has been high up to 70% recently just stopped so rH sits about 50% now. I’ve got 2 Vivosun oscillating fans to air flow is good. Also using ac infinity T4 with passive intake. Pics below.
 

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Not a biobizz user, but a quick look at the girls and then a poke at goog and I found this.
SmartSelect_20210404-091016_Chrome.jpg


pH is measured on a bell curve like earthquakes.
 
Not a biobizz user, but a quick look at the girls and then a poke at goog and I found this.View attachment 1304018

pH is measured on a bell curve like earthquakes.
Thank you. You think it’s a deficiency issue? My pH starts at 6.5 but after I add the nutes, it drops to about 5.9-6.0. Fastbuds says that for these specific strains, strawberry should be good anywhere from 5.5-6.5 pH and lemon pie they recommend 6.5. I will try pH’ing up to 6.3-6.5.
 
Thank you. You think it’s a deficiency issue? My pH starts at 6.5 but after I add the nutes, it drops to about 5.9-6.0. Fastbuds says that for these specific strains, strawberry should be good anywhere from 5.5-6.5 pH and lemon pie they recommend 6.5. I will try pH’ing up to 6.3-6.5.
pH out means she can't uptake the nutrients you've provided. In soil, nutes available 6.2 to 6.7. Coco runs in the 5.8 to 6.2 range.
 
in my humble non-biobiz using opinion it looks like the start of a calcium deficiency or lockout. Ide check my runoff water ppm and see if its alot higher than what im putting in... If its a lot higher, your
ph may be drifting too low, if its the same or lower, plants might just be wanting more.
Just my two cents
 
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