need help with using NFT

[mickliam]

hello is there anyone who can tell me if im using NFT system rite?
this is my 1st time using the system, i have 2 plants and im just days away from cropping. 1 plant is really done well but the other as done bad im just wondering if the plant thats not done 2 gud as not been getting the same nuts as the other which is closer 2 the pump. If so anyone got any ideas how to get round this???hmmm

[Racefan]

pics of your set up is needed. Questions need to be answered. Res size and temp? Wide gully or narrow channel? Nute type and strength? Room temp and RH? Room size and light size? Is the light air cooled or batwing? I can't really tell you unless I know more.

[mickliam]

thanks 4 the reply racefan will get the pics and info u need and get bk to u

[Racefan]

to answer your question about the nutes not flowing around the plant...yes to a degree that can happen. But there has to be more to it. if it is in as bad of shape as you made me think it is anyway.

[mickliam]

Hi Racefan, Just got back with the info you asked for, I have taken a few pics of the set up and the 2 plants, I grew both plants from seed,

Resov Size.
Is 41in x 17in x 8in deep

Nutrient.
I have been feeding them on IONIC
Started off with half strenght Nutrients for the first few week after germ

IONIC GROW at 7mls to 1 litre through veg.
IONIC BLOOM at 7mls to 1 litre flowering
IONIC BOOST 1ml to 1 litre once a week.

at any one time i have had no more than 20 litres of solution in the tank.

ROOM SIZE- 1 3/4 metres x 2 1/2 metres by 2 metres high. and is fully lined with reflective sheeting.

TEMP- I have found it hard to keep room temp low because of us having warm weather avg day time temp in the room about 32'c
Night time about 23'c

RH- as ranged between 40% to 70% most of the time about mid 50's.

Been using carban filter and fans to get rid of excess heat,

PH AND EC- i have been making up nutrient solution in 15 litre bucket setting PH at 5.5 and EC at 1.8-2.0 then pouring into the resov. Water been kept at normal room temp.

After doing my own bit of research i have found that by not cleaning out solution and just topping up the tank i have not taken into account the level of nutrient already in the tank and the plants.

Q, If so that doesn't explain why one plant did so well and the other did so poor,

Q, Also the plant nearest the pump being the better of the two if its a case of to much nutrients

LIGHTING- HID 400w Veg light (blue spectrum) then changed over to HID 400w flowering light (red spectrum) and also added 200w Compact flourescent lamp with (red spectrum)

[DaMagoMan]

Resov Size.
Is 41in x 17in x 8in deep

He's gonna want the ResTemp/solution temp too

Looks good from here
Great Job!!!

[mickliam]

Originally Posted by DaMagoMan

He's gonna want the ResTemp/solution temp too

Looks good from here
Great Job!!!

Thanks not been taking temp of res maybe should do it on next crop, any more info you have would be much appreciated.

[Racefan]

Originally Posted by mickliam

Thanks not been taking temp of res maybe should do it on next crop, any more info you have would be much appreciated.

Yes res temps are very important. Room temp isn't good when the temps are 36'c. Can you show me a picture of your roots in the tray? In the one picture that shows them it looks like I see rotten roots (brown). Roots should always be covered from all light and should stay more white than brown although there are some nutes that turn them brown.
IMO Part of your problem is your reservoir size. You need twice as much as what you have been using. For 2 plants 38 liters is the rule of thumb. Smalll reservoirs go through drastic fluctuations extremely quickly. You can check and adjust the PH one day and have it way off the next so they require almost constant attention. (Ie...several checks a day) I think blockage by the first plant played a small part as well. Res and room temps were a small culprit and I'm sure helped with the problem.
Another question...are these two plants the same strain or are they different?


PS. I like the colas. I know growers who would give their left arm for colas like that.

[mickliam]

thanks i was really pleased with the colas! i was like WOOOOOO when i chopped it down i did'nt exspect to see a big yellow flower on top. the plants are of the same strain both are Syrious (not quite sure if i spelt it correct ?) i don,t have any more pics of the roots. I got a couple more just put on veg 1 is Master Kush and the other is ice cream, im goin to pay more attention to the tank level an keep the nute build up under control, i got more control of the temp now the warm weather as gone. have you had any experience with using liquid light?