Nova Scotia green crack grow issues

Hey, from Nova Scotia weed is league here. Allowed to grow up to 4 plants. I am growing 3 green crack females all of them are about a month in to flowering. Feeding them remo nutrients all the way. Topped one plant. The other 2 have one main stock, the other 2 should be about the same height but one is having issues it is shorter and is developed copper coulorings on a few of the leaves,pics included. More info, pro mix soil organic". Spraying cyclone to treat for powderd mould. Plants get lots of sunlight where they are. Soil ph is about 7 on all 3 plants. 2 of them have been thriving the other seems like it's not living up to its potential, it's developing a copper tone on 10% of the leavesany thoughts?? The guy at the grow shop said I needed ph down formula cuz the ph should be at 6 rn

Also this bug has been hangin out since day 1 anyone know what this bug is. They hop on to the bottom of the lead when they see me

Anybody trim off yellow leaves during flowering, few bottom fan leaves are yellow

bug is a leaf hopper, get rid of it.

A little high in N, maybe a little damage from that, and some cold damage from the night temps falling I am guessing. Overall looks great. Just get rid of all bugs, even if they don't hurt marijuana they attract things in that will.

The Gram Reaper said:

A little high in N, maybe a little damage from that, and some cold damage from the night temps falling I am guessing. Overall looks great. Just get rid of all bugs, even if they don't hurt marijuana they attract things in that will.

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What would u recommended to spray for bugs, how should I adjust my nutriance formula accordingly

Just do more waterings than feedings until it lightens up a little. I am not too experienced with outdoors or pesticide but there are a lot of homemade remedies. If you are outside its going to be a little hard to fend of things, you will just have to routinely inspect.

Got the ph down and also ph test kit for my water. My watering can with Remo nutrition is 5 ph but my soil is 7 how do I get my soil to 6?? By making my water 4 ph will that work?

Just keep feeding it ph 7 it should be fine?

Why feed that low of ph?