Clear all

Questions Nft hydro problem

3 Posts
2 Users
45 Reactions
Posts: 2
Forum Member
Topic starter
Joined: 2 years ago

Hi can any 1 please help im growing on nft table and have been for years now. Problem im having is plants are drinking around 20l a day but the ec keeps rising I dropped the ec from 1.6 down to 1.2 after doing a 24 hour flush with just ph water at 5.8 and it still rising the plants are in 5th week off flower. The plants look really healthy. It my 1st time growing under  840 watt LED lights and have read the plant eat less under LED lights. I am using canna aqua a and b foods  my pH is at 5.8 but raising to 6.1 to 6.2 by the next day. Can any please help. As normally my plants are eating loads by now and normally around the 1.8 ec. My ec of my water before  out of the tap is 0.4. Can any 1 please help

Grow Medium
Grow Light
Temperature C/F : (Light on/off)
Picture of Problem

Canna aqua a and b

pH Level
EC / PPM / TDS of Feed


Feed Frequency
2 Replies
Joined: 5 years ago

Patreon Bling
1 Complete Grow Diary Award
The High Council Award
Admin Bling
Discord Member
10k Posts Bling
100k Likes Bling
Member of the Year
Member for 4 Years
Posts: 12503

@mr-roots pH swinging from 5.8 - 6.2 isnt a bad thing mate, thats fine. How much is the EC rising by? A litte rise is also no concern, and it would usually rise after educing the EC too, so it will be good to give it a couple of days for it to settle and see how things go then. Its getting warmer now, so plants will be drinking more, this will have an effect on the ph and EC too. 

The plants look healthy so dont worry too much right now, just give them a few days to adjust to the new EC and see how they look then

Are you adding any PK at this point too? 

Forum Member
Joined: 2 years ago

Posts: 2

@macky Hi mate thanks for getting back to me ec was at 1.2 and raised to 1.4 by the next day and yes I'm started the PK this week. I check my tanks on a daily basis.  I'm a bit lost at the moment as never grown with LED always with sodium lights and know growing with LED is completely different.


Our forum is free to join. We are an international cannabis forum that helps people all over the world grow their own personal supply of cannabis. Through our site you will find cannabis breeding forumscannabis deficiency forumsindoor cannabis growing forums, and much more. 

We are a home growers cannabis forum, and we only allow people who grow cannabis for personal use to be members. Our mission is to help you grow your own cannabis. We do not buy/sell/trade cannabis, or equipment for growing cannabis. Our site is strictly a cannabis smokers forum, cannabis growers forum and forum for medical cannabis users.

Use our guides on how to grow cannabis, cannabis grow diaries, and growers forum to find all the info you need to learn how to grow your own cannabis.

Any member who is suspected of growing cannabis for commercial gains will be banned immediately.

Please read our forum rules, and enjoy the site.

Find us on all social networks! Just search for Percys Grow Room