Mealies, fungus? and heartbreak

[lkg1323]

I made the novice mistake of not inspecting plants just because they came from the most loved vendor.

Long story short - I put plants apparently infested with mealies in a grouping of all my other chids. I've been super busy and not giving the orchids my 100% attention. MEALIES EVERYWHERE. Awesome! Kicking myself.

What is the best way to treat an entire orchid collection? Chemical dunks? (and which chemical is best suited for this?)

I've heard of water/alcohol mix being sprayed for weeks - what about peroxide? I only ask because I have an abundance. I've never had to do this - and I'm having trouble finding if there is an "upper limit" to this sort of thing - I definitely don't want to kill all my chids by going overboard.

(I also have small black depressed circles on the leaves of my banfieldara gilded tower, is this most likely fungal?)

Treating all these the best I know how, buying some small fans and a humidifier as well. Wish me luck. I seriously need it, Any suggestions/recommendations would be greatly welcomed. Treating the whole group seems super daunting