The green color coming out is perfect, mean they are happy and stabile. Hope you can keep the rootrot away this time.
When it comes to my rdwc-girls i just realised i gave them to much magnesium. So next time there will be no extra mag, only if they scream after it. Im pretty sure excess of mg was a bad guy made me believe the girls were okey, i think they were underfed but overfed of mg. Have to try and see if im correct.
Also, will put the extra air-stones in the rez instead of the buckets.
Will stay around to see how you are doing.