is this normal?(pic)

definitely normal. i believe those are potential new roots too. the plants seem to send out little test-roots along the base of the stem, and those bumps look like the result of a failed test (didn't find soil).
 
well my leaves are changing color also, along with all the leaves curling down, they seem small also, and alot of red branches, i think i have some root rot, i looked at the roots and a patch was dark colored, there is also a new set of bright white roots, i read to try some peroxide, so i put a cap full in my reseviour, please give me input, i am in the 4th week of flower.
 
well my leaves are changing color also, along with all the leaves curling down, they seem small also, and alot of red branches, i think i have some root rot, i looked at the roots and a patch was dark colored, there is also a new set of bright white roots, i read to try some peroxide, so i put a cap full in my reseviour, please give me input, i am in the 4th week of flower.

Im not too sure about that since I really havent had that problem, do you have any full plant pics?
 
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