Plant problem

I'd get yourself an RO system and run your rain water through it......you're already going to need CalMag using the poor rainwater......take the same water and RO it....then use it. You shouldn't need the UV sterilization either but could still use it if you wante too. The trick would be how to feed the rainwater through the system since the ones I've seen are designed to hook up to a pressurized water system to run.

Or go to an RO system for your 8.5 SLUDGE.....but I'd go with as many (is it five?) filtration stages as you possibly can if you use tap water.

I think the mother plants the clones came from were already suffering from lack of ca and mg so from the start things were not ideal. yesterday I sprayed them with a mild solution of calcium ang already today they look healthier. I'm going to follow up with a mild solution of mg in a few days and see how things go. I'll post some more pics then.
I'm going to see how it works out with the additional Ca/Mg and decide weather I realy need to change to RO water.
thank you all for your advice...keep it coming...
Free the smoke for all.....:rastasmoke:

sorry to see so many injured plants man....i feel

however, they are not very big for 11 weeks old (even for clones) and i wonder if this has been a problem from the start or not?

but stop using rain water, theres no real reason why its better than distilled, or possibly even tap water.

I have beenusing rockwool for a long time. First thing you to do is figure out how much you feed you plants per min. 25% of that should be run off. usually start feeding about 1 cup per day once. once roots start to grow out bottom of 4 in. cubes i let them run a little dry mabe 1/2 cup per day to make the root look for water in the 8" cubes for a few days then go back to my normal schedual. once rooted in 8" cubes i increase to about 4 cups once a day. this should leave you with about 25% runoff ( about 1 cup ) After this you need to watch your plsnts. when start to look a little dry or heat stress add another watering about half way through your cycle ( about 2 cups) this should give you about 25% runoff. You may have to mess w/ your timming a little bit to get the proper 25% runoff. Now for checking your runoff. If your runoff is showing higher ppm and lower p.h then you need to decrease your total ppm in your res. and vise versa. One other thing you should flush once a week. I like using hydroguard w/ r.o water. dont forget to p.h balace. help this helps. later

you need to keep your res about 5.5 ph. youl see what i'm talking about when your runoff comes out near 5.8. later

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Originally Posted by hybridlove420

sorry to see so many injured plants man....i feel

however, they are not very big for 11 weeks old (even for clones) and i wonder if this has been a problem from the start or not?

but stop using rain water, theres no real reason why its better than distilled, or possibly even tap water.

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hi thanks for concern.
the plants had only 10days veg growth from clones and now one week flowering.
Things are looking better since i gave them some calcium & Magniesium.
They have nearly doubled in size in the last 2 days so i can see some sort of normality returning.
here are two more pics.
I'll post some more pics in a few days

Great. They look MUCH happier now.
If you have a sec, go through and remove all leaves that are dead and dying for 2 reasons:
-Dead leaves sitting around attract pests and fungus yuck
-This will give you a starting point of reference to see if there is any more die-off since you have changed your procedure. If not, that was your issue. If you see any more problems, you still have some tweaking to do.

i'm still trying to work out Ca/mg dosing to add to my generalhydro nutes.
I've read weedhounds hydro nute schedule but 50/50 ratio of CalMag and Pro gro seems alot of CalMag,(I'm Not using CalMag, I'm using canna Ca and canna Mg)
I was thinking about using a dose of 0.5ml per liter of both Ca & Mg plus my regular general hydro nutes. Does that sound about right?
On the bottle it says 1-2ml per liter, but I asume that is the recomended deficiency dose but not quite sure.
When I sprayed the plants with Ca/mg mix I dosed at 1ml per liter of each.

Unfortunately I'm not sure how the Canna and GH ratios would compare; what I'd do is start at a rather low dose of the Ca/Mg additives (so maybe half of what the bottle says to start), watching the low leaves for signs of Ca def (yellow with necrotic light brown blotches) and the middle leaves for Mg def (clearly-defined pale stripes between the veins). Adjust your nutes accordingly if you see this. Be careful not to go too high too fast, especially with the Mg supplement.

I think I added too much Mg. first they started to look better and then worse. big leaves are quite dark and curling down with some lower leaves still yellowing, some of the roots looked with not much root system and off white maybe from nute burn.
2 days ago I dumped the nute solution, sterilized the tank with H2O2 and flushed the plants with a solution of H2o2 ran the system on/off till the folowing morning. The next morning I dumped the res EC.0.6 filled the tank with water EC. 0.1 and ran the system as normal. This morning the plants looked healthier some leaves even have a healthy shine :) I checked EC 0.4 will keep it with same water till tomorrow. If the EC is the same in the morning and depending how the plants look I'll add my General Hydro nutes at 1/4 strength and see how I go from there. This morning I flushed the mother plants with water as they also looked over nuted with leaves curling down. Already they Sprayed all plants and soaked rock wool with water and rizotonic 4ml/L.
did'nt put any pics. embaresed

Next time I add ca or mg I will measure the start water in this case EC. 0.1 and add ca & mg until The EC is between 0.3 & 0.4
which I believe to be the EC of softish tap water. I believe this is much beter than even going by manufactures Nute recomendations even at half doses.

Not too sure if I should add equal parts of Ca & Mg.
I was thinking to add 2 parts Ca to 1 part Mg as i believe generally there is more Ca than Mg in good tap water but would like your input on this.

Thanks in advance