The main thing I see is the r/o well water. R/o water will literally suck the nutrients straight out of your frogs.
However I have no experience with well water so I'll admit I'm not sure of a solution... Hopefully Griff or Carlos pops in soon with their formidable frog knowledge.
You also say the rack is in a medium to high traffic area. Low traffic areas will reduce stress from noise and big animals (ie humans) passing by.
I do have some questions about your rack tubs though. Are they clear? If clear, are 3 sides covered? Can the frogs see one another? What is the photo period for your lighting (how long is it light and how long dark each day)?
6 new frogs all in once go? Talk about jumping right in!
Edit: I forgot to mention that the tubs are too big for babies, which can cause stress and cause them to not eat.
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