...and another stable day - pH was 6.0 at 8am and still 6.0 at 7pm.
Topped the tank and got it set at 5.8.
Friday/Saturday will be the next tank change - hopefully things will hold steady until then.

looking good man im doing a similar type drip system should check it out

Prnkstr's Second grow! Various Strains

as far as the H202 goes i would not use it unless you have root rot or other types of root problems. It can be used to add some air to the water but some airstones do that pretty nicely. I use clearex myself to clear out the rockwool and hydroton every other week seems to be going good so far. Also H202 cannot be used with organic nutes im not sure if what you are using is organic so i cant say for sure or not if that was the problem. I continue to have a similar PH problem with mine as well but it was due due 2 things as first 1 - I was using tap water so i got an RO system. 2 - I use an additive called Dark Energy it raises the PH of the water over about a 24 hour period so i have to maintain it during res changes. Looking forward to see your next post!

Looking good mate
Keep in mind that you want your ph to go slowly up. It means the plants are eating. If it climes too much in the medium it means that you do not have enough 'run off' in the watering cycle to bring it back into balance. But it looks like you are dialing it in
PH in Rockwool will spike like this in the first view weeks and the spots on your leafs are related in my opinion to the ph being erratic like it was in the beginning, probably causing a lock out. I would not cut off h202, especially since you have a mix of hydroton and rockwool which is not an ideal combo due to the fact that the rockwool requires a lot less watering then the hydroton. The h202 will bring more oxygen to the roots, use it, just stay within Al's 1.7ml per liter (35%) and don't over due it.
I am not blessed with a green thumb and have so far learned by 'deadly' mistakes and by the kind people here sharing their experience. My biggest advice: DO NOT SMOTHER YOUR BABIES WITH LOVE, AND DO NOT OVERREACT TO A GIVEN PROBLEM. Sit back, ask for advice, and have several people agree on a solution before you administer 'first aid'. At least until you know whos advice holds true more often then not.
Btw, if you are using RO water, are you supplementing with Cal-Mag?

Unity

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[quote=prnkstr;1709381].....add some air to the water but some airstones do that pretty nicely. I use clearex myself to clear out the rockwool and hydroton every other week seems to be going good so far....[quote]

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i agree with unity, cal-mag may be needed even with tap water. the spots are def the start of ca deficiency


-OitW

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Looks good to me,when i saw the film i saw a couple of obvious flaws.With AL in the grow as a advisor you should get way more weight....

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I'm using plain tap water that's not been "softened". Spose I should dig up info on my local water treatment plant to see what's up.
Either way I have another trip to the hydro shop planned, so one more thing on the list...

Checked on the pH this evening and it was up to 6.3 (I lowered it to 5.6), and I noticed that the tank doesn't seem quite as clear as it was yesterday. There's no goo in it, just a little murky. Hopefully it will make it until Friday before it needs a change.

Plants are looking good in general - lots of growth overnight
Just realized a bit ago that I really shoulda topped these buggers a while ago. My hope is to get a mother or 2 outta this batch, and a little extra branching is always nice for them, or so I've read. I'll have to give that a go tomorrow evening.

On the subject of topping plants that are planned to be mothers, does the attached diagram describe the proper method? (seems pretty clear to me - cut at 1 and see it branch out at the 3s) One of the plants (#10) topped itself very early on - I assume that topping each of those would be prudent too? Any suggestions on how often to top the mothers-to-be in order to achieve a plant I can get several clones off of? I say "several clones" cuz I haven't really decided how many I want to grow at once - just gonna take it as the plants give it to me...

Thanks again for everyone's suggestions!

Attached Images

Topping.jpg (66.2 KB, 142 views)

i was gonna ask you the same thing about topping lol Ive never done it before and want to give it a test run but i think i may wait till the second gen mothers or first set of clones to give it a go. I need to get some pruning utilities as well so I am gonna wait to do it right rather than using my ghetto scissors in my kitchen . Ill keep up posted though i may go and do it tomorrow anyway. As far as i know now would be an OK time to do it to the mothers so it branches off and you have more sites to take clones from. top it then wait about 2 weeks and top both of those, that's my plan anyway.

Well, I decided to give topping my plants a go. Attached you'll find pictures from one of the plants - Before, Pre-clip, After w/tip and a little closer shot of the aftermath. Pretty sure I did it right, but any comments are appreciated.

I also included a new shot of all of the mothers-to-be.

Topped my res this evening and it was looking pretty decent, the murk hasn't gotten any worse (forgot to check pH before topping up water, but it was 6.3 after the top up, so it couldn't have been too bad previous). Lowered the pH to 5.5 after the top up.

Attached Images

	12-20081204.jpg (53.3 KB, 108 views)
	12-20081204-Pre.jpg.jpg (44.5 KB, 109 views)
	12-20041204-Topped-Head.jpg.jpg (44.6 KB, 139 views)
	12-20081204-Topped2.jpg.jpg (39.5 KB, 95 views)
	DripTray-20081204-02.jpg (52.8 KB, 165 views)