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Get rid of the alge; you are keeping the rockwool too moist either by watering or your humidity is too high which is causing the problem to worsen.
Get 1-2 tsp of h202 per gallon of water next time you water to rid of the alge growth.
It locks out the air causing the roots to asphyxiate and causes the leaves to distort and die back.
How often do you water?
You will need to get a de humidifier, cause if you flower with that RH..... you are in for a real treat of what pain is like when you get mold/mildew problems with that many plants........
thanks Stitch.. If the alge you speak of is the green stuff on top of the rockwool, that has been there since they where clones and rooted... i don't water through the rockwool and i water every other day or every 2 days depends when they want me to feed them..There going into a DWC system this week.
When you say 1-2 tsp of h202 are you referring to the normal h202 we use to clean out cuts and wounds? (the 2% stuff)? or should i goto the local store and get some more concentrated?
Yes, the 2% stuff. use that with the amount I listed above; you want to rid of that before putting them into a system, you can bring the alge growth to your system and you don't want that.
WHat does your mixture contain besides the rockwool? Perlite?
You tested how the pH is coming out when you water? The first pic the leave looks more like a mutation......
How many of those are doing that?
Or coming out different shades of green?
theres that only one, or maybe 2 that i have seen that on..i fed yesterdat but i will mix up a bit of water with h202 and put it on the top of the rockwool as my cubes are completely dry and they have been for quite some time allready.
theres nothing else in my mix just straight perlite they should have been in the system a long time ago but i was caught up and wasnt able to complete it on time so i decided to just put them in some pots with perlite and feed them as they need it.
on a side note, i have been told that green stuff grows on there cause of the light and it started showing on the cubes about a week in a half after they where in the humidity dome.. i have received clones from others with the same issue and people say it is not a problem. From here on out i will be using block covers on all my cubes
EDIT: Never checked the PH coming out as i didnt think perlite will effect it.. i pour no water onto my blocks but they where PH balanced before they where used for the clones
Stitch, I am by no means a plant doc, but the dosages for the off the shelf H2O2 (which is actually 3%) that I have seen would be much more than what you've stated. Your recommended concentration seems more in line with the 35% H2O2 that you find in gardening centers.
Just curious if you have some additional info that I may be missing from my research?
No. if you go by the dosages the bottle gives you will end up having issues; not to mention in this situation we are ridding alge growth, not root rot
root rot you can use more per gallon, but the roots can't be sitting in the amount depending on the amount; it would be much better used for dipping the roots in another bucket with a stronger solution rather than using a strong solution in with the water/res.....
h202 can kill bacteria, but it also kills the good stuff leaving the plant vulnerable to leftover stuff that was not killed off by the h202.
It's most likely the humidity that is causing the rockwool to keep too moist then perlite won;'t affect it; the nutrients is what affects the pH.
well the humidity is under control, like i said ive had it since about 1 week or so into making the clones, didnt get around to adding the h202 today but will do it tomorrow. My rockwools have been dry to the touch for quite some time now tho... is it possible that it is from heat? there sittings under a 400mh..