Deficiency or toxicity or pests?

[PuffinBlueClouds]

Pictures below.
Hi so for a 2-3 weeks now ive been struggling with these 3 theyre all nearly 6 weeks in veg and look like theyre rather small for that long.
lots of light green leaves mixed with dark green and some yellow tears.

I checked with a jewellers loupe and i seen 1 tiny yellowish exoskeleton looking "bug?" on the main stem of a big leaf, no others on it, i proceeded to check atleast 6-7 more leaves across all plants and didnt see any more, is this a problem? he was just sat there scratching his ass.

Coco
PH -5.8 in (5.9-6.1 out)
EC - 1.2 in (1.4 out)
RH - currently 68% (usually 60%)
Day temps - 22C (71.6F) constant
Night temps - 17-19 C (62.6 - 66.2) Is this too cold? as i will have to buy a heater if so. (gives me an excuse to buy more ac infinity goodies :)
using advanced nutrients A+B plus a few others of theirs.
have never gone over 20ml per L on any of the nutes.

I never had cal mag for the first 5 weeks and have only started giving them it for the last week, im not sure if this it a problem? but after 2 feeds with it i see no change in new growth which is what is mostly effected.

Thanks for any help, these things are really stressing me out, i feel like im wasting time, money and energy!

Much love

 

[Putthataway]

Aphids leave their exoskeleton behind.

 

[PuffinBlueClouds]

Aphids leave their exoskeleton behind.

Yeah, so this one i seen was moving a little bit, yellow jelly looking.

 

[Hossgrows]

Looks like u might have a few things going on.

 

[PuffinBlueClouds]

hey thanks man, so is epsom salts the equivelent to Cal-Mag?

 

[zack991]

No, Epsom salts are not a direct equivalent to Cal-Mag (Calcium-Magnesium) supplements, epsom salts is magnesium sulphate, not magnesium and calcium. Using only Epsom salt to treat a supposed "Cal-Mag" deficiency (such as blossom end rot) can worsen the issue by causing a nutrient imbalance.

 

[Hossgrows]

No, Epsom salts are not a direct equivalent to Cal-Mag (Calcium-Magnesium) supplements, epsom salts is magnesium sulphate, not magnesium and calcium. Using only Epsom salt to treat a supposed "Cal-Mag" deficiency (such as blossom end rot) can worsen the issue by causing a nutrient imbalance.

Probably right. It'd slipped my mind that he's in Coco.
Wonder if the coco was amended beforehand. Not that I grow in it, just what I read about, with those that do.

 

[Ninjadogma]

Your magnesium and phosphorus uptake are off, and signs of mild insect predation going on. You can keep the bugs in check with Neem and spinosad but stop using the neem when flowering. The combination of mag and P can show up if there's a been a cold snap or if there's poor root oxygen.

 

[Ninjadogma]

hey thanks man, so is epsom salts the equivelent to Cal-Mag?

If you're going with epsom salt for your magnesium, you can pair it with calcium nitrate or gypsum for your calcium. If you're just feeding, give your cal and mag together. If you're correcting a mag deficiency, leave the cal out.