I would recommend that once you mix the solution, and get it PH'd etc. To find a CLEAN cup or something, scoop some res water with the h2o2 and flush your hydroton. This will help the solution combat what root rot is already developed in the root zone if there is any, also refreshing the PH in that general area cant hurt.
I have a few questions
How big is your res and what type of air pump do you have? I use 10 to 15 gallon tetra air pumps per bucket 5 gallon bucket. This is because they are cheap and my solution is not chilled so the amount of oxygen actually reaching the root zone and or oxygenating the water is severely diminished.
Have you taken clones of your best two ladies yet? You will most likely be able to save them when you switch over to a sterile res, however it never hurts to be prepared.
Lastly I might be dumb or blind, but I remember there being a conversation about weather or not your reservoir has any light leaks. Is this not a huge hole in the middle of your reservoir?
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What are those black tubes BTW? whatever they are you should run some hydrogen peroxide and or alcohol on a cloth and wipe them down to remove any sludge, this goes with your whole system. The bucket should be cleaned, sterilized and then rinsed down with clean water.
Lastly I would suggest upgrading your air pump once you research how much oxygen is reduced due to the temperature of the water. The air pump should completely over do the amount of air you think is required to compensate for the diminished oxygen. So if you have something like a 5 gallon res and your water temperatures reach 71+ etc, and lets say you are running a 5 gallon air pump, there is a good chance that only half or less of the oxygen being produced is being used. So over compensating is a must, unless those black tubes are some form of cooling vs just creating a light leak.
Just remembered when considering the size of the air pump, also consider how far down your air stone is in the reservoir, the further down the harder it is for the pump to push air.
I hope this helps.