Bongojaz
o.k. bert, here goes. i don't know if anyone has told you, or if you know or not. you've made a huge mistake in your scrog, which is going to cost you "huge" in the yield department! although your grow is very, very nice. it could be 2wice as nice! when doing a scrog, you need to veg your plant(s) into the screen before you put the plant(s) under the screen. what you want to do is pull the growth tips back under the screen (in veg) and position them to empty parts of the screen, filling it up. once it's around 80% filled, you flip it to flower. fill the rest of the screen in flower and you'll have so much bud you won't know what to do with it! you also want to cut off all of the foliage beneath the screen as it fills, since it won't be getting any light anyways once it fills up. here's a cut and paste job that explains scrogs better than i can. greenmonster is "the" scrog master!!!
Yea, I'm not very happy with how it turned out with me not filling my trellis all the way up. The info on this breed says it doubles in size when flopped 12/12 and if you look at my first set of pictures, it looks like the plant is filling about 40% of the trellis when I changed to flowering. I think I'm getting an idea how I'm going to do my next grow based off how this girl turned out cause I'm prolly going to do this strain again.

subzero
Anyways..... Bert add the calmag and any other additives first manufacturers instructions( low end in my experience) then bring your ppm up to target with your base nutes. Don't put your ph tester in pure ro water it will fuck it up. Ro water has no potential hydrogen, it takes on the ph of the impuries you are adding(sort of) ie nutes. Now, if you get defficencies next run with ro or ph is unstable, try adding back about 20 % waste water. I know, I know contamInate your precious ro.... But cannabis needs other micronutrients that are naturally in tap. Rather than trying to chase defficencies you put a little of everything back in the solution. Helps buffer the ro as well.
This is what my hydro guy suggested aparantly aquarium people do this as well. IMHO 300 ppm tap should be ok without ro filteration( you did say your tap was 300 didn't you?) but it's your pesos not mine. My ro unit is somewhere in the shed. I'm back to tap as I can't justify all the waste water and time farting about with it. I did a couple of ionic runs after your last thread. Totally underated stuff man, as good as anything else out there.
Read as much as you can about ro water, it can throw you a curve if you ain't careful.
Ttfn
Subzero
Thanks for the valuable info yet again Sub. Speaking about my PH pen, it started doing something weird where when I first put it in the water it drops to like 5.5/5.4 and then comes back to what my PH should be, generally 5.9. It just started happening recently, maybe even since I started using R/O water....I can't remember. About tap, last time I was at the grow store the guys there said that everyone was complaining about there water recently, everyone was having problems and we are all off the same water facility.

demoreal
1) This is the most efficient T5 grow I have ever seen. Nice job.

2) I had the problem of my pump running dry when growing few plants in a large tray. The way I fixed it was by putting 2 liter coke bottles filled with yeast and sugar in the tray. That way when I water it takes less water to fill the tray. I also got the benefit of a slight increase in co2. Just an idea so you do not have to worry about the system running dry.
For you gallon milk jugs would work better. Even just with water if you do not like the co2 idea.
1) Thanks alot!
2) Man thats a great idea, I can't believe I didn't thing of something like that....that could really help on my next grow too because I was wanting to use my 20 gallon reservoir instead of the 40 gallon I'm using right now but still be able to use the same flood table.