ph swing?

[yembo]

yesterday i added about 2 and 1/2 gallons of water that was ph'd to about 5.2 so it would lower the ph a little in the rez. well i believe there was too much of a ph swing as the meter read 5.8. in the 2 and 1/2 gallons i didn't mix in any nutes. well...looked at em this am and this is what i saw:



I changed out the res with tap water (i don't have a ppm meter atm so i don't know if it's hard or soft) and mixed in veg nutes. put the plants back in and this pic is about 5 hours after doing so. so not much change. Everything was going great until i added the water so nothing else has changed. shed some light please!

ps.
strain is so said hashplant, don't know the vendor and it's ~5 weeks from seed in lava rock. res temp is 72.5 and ph is 6.4 with the new water and nutes. under 400 watt mh bulb cooled w/ an inline fan that barely gets the job done.

 

[MynameStitch]

looks like you burned the hell outta your plants and or; also ph issues played a big role. Growing hydro without a proper pH, TDS pen is like driving at night without head lights.

You do not know how much your plants are taking out of the water, once they take it out ph may rise which is most likely how your ph is swinging.

You rinse that lava rock really good before using it?

Your water temps need to stay under 70 for optimum uptake of air and nutrients. Anything over it and they can lead to less o2 in the water which can trigger bacteria growth and thus fungus/root rot issues. You want to keep temps 65 to 70 F

You definatly need to get a TDS pen; do you have a digital ph pen now?
What are you using to test ph?

if you have 5.8 without nutrients then your water is soft.
How much veg nutrients are you using per gallon of water?

How big is the bucket you got that in? 2 1/2 or 5 gallons?
You need to get some ph down and keep your pH level around 5.5 to 6.3

6.3 pushes it even then most of the time.
So you first need a TDS pen, get ph down and water temps down. The entire plant is affected so you will only see recovery with new leaves; it may drop most of the leaves down the line which is not going to be good; I bet most of those leaves are crispy or dry feeling aren't they?

Are you using any other additives in your setup?

Considering you do not have a TDS pen you do not know what PPMs your tap water comes at; and you have to know this in order to adjust and know how much PPMs add up with water and the nutrients.... so there is a problem too.

 

[yembo]

you're right, the leaves are very crispy and even though i switched out the res with new nutes, the leaves just got worse. I don't have a ph pen, that and the tds meter are the VERY next thing i am getting just don't have zip for cash atm. the res is actually 10 gallons and the lava rocks were cleaned thoroughly. the plants have been doing really well until i added in that water :x here's a pic of them on friday i believe:



i actually just followed the nute proportions on the back of the gh bottles and hadn't used much ph adjustments. i had been measuring with the ph with the pos HD brand soil meter so that's why i haven't been making many ph adjustments.

as of right now all of the leaves on both plants are entirely wilted, stalks and stems are still nice and green, but i'm sure the plants aren't going to pull through :x i added a cap full of superthrive to the res for the first time, to see if maybe it will help out. i also pulled the light as far away as possible from the plants.

edit: actually i just did some inspection and on one of the plants there are signs of a LITTLE hope. out of a few stems i can see new healthy looking growth, a very little bit, but it's something. both of the plants trunks are still pretty solid, but most of the stems branching off are still green but a little mushy as they aren't standing at attention anymore. i know that the plants feed off the leaves, but most of the leaves are completely depleted and crispified is there anything else i can do while i wait on the meters? thanks for your help stitch

 

[MynameStitch]

oh god; get that superthrive Out of your res!!!! a cap full is nuts!!! 1 drop per gallon is all you need; but I would not recommend using it for hydro.
Your plants are already burned from your feeding regimen.... your superthrive is going to really crisp those leaves up if you do not get it out of there quickly!
Rinse out your res again get that out of there!

There is pretty much nothing you can do for now, but

you using all 3 GH nutrients? If so are you mixing them right as it lists to mix them 1st 2nd and 3rd.......
If not that is another huge cause to your problem.
How much are you using of those GH?

I would add less than what GH is recommending for your grow; your plants look like they do not like it. Most of the time you can't listen to the back of the bottle; the regimen they ask you to feed is always way to strong. Canna is one of the brands that you can trust when it comes to there feeding regimen.

How are you keeping your water temps down? They need to be at a certain range..... 65-70; are you keeping track of that too?

What color are your roots?

 

[yembo]

ooo, guess i've got some cleaning to do. i'm going to finish foiling up the res as just adding that little bit on the top brought down the temp a few degrees and see what that does. the roots are still a real healthy white with no signs of rot or anything of the sort. i'd upload a pic of the plants but for some reason not letting me upload. all i know is it looks real bad, 80+% of the leaves have been crisp since this am as well as the majority of the stems being wilted