Pest Identification- 6- legged white- but also changes color to blue then green? Looks like a big spider mite

[Growzay]

I found an infestation on my broccolli and cauliflower.

at first I thought they were white fly - then upon closer inspection- with magnifying glass I saw that was not.

I've never seen this type of aphid/mite-

What kind of bug is this? What should I use to get rid of them? Neem oil? horitculture oil- animal fats?

 

[Growzay]

Thanks T-

TCLynx said:

Give em a day or two without food and then feed and see what happens.  Sounds like between the heater, salt, water change etc that they may have had a bit of stress.  If there is algae in the tank with them, they may be snacking on that when you are not around to see it.

[matthew ferrell]

How much higher is your pH than 7.6?