Hi,

1) I take it you're experiencing slow plant growth too? could be lack of nutrients, could be low oxygen - are any of your roots a tan/brown colour? Are the leaves perfectly green? How old are the plants?

2) Theres no reason, especially once the roots have grown into the spreader matt why you should not have the pump on 24 hours a day? Your water should be oxygenated enough, if not check the res temperature.

3) dont use canna, sorry
Bluefunk Reviewed by Bluefunk on . Hydro help needed Hi Guys This is my first post and although been growing for a couple of years I still have problems. 1,Very little root mat, any theories 2,How long should i leave nutrient pump on (NFT)currently 15mins on 15 off 3,Where can i find correct EC levels for various stages (using Canna) My set up is as follows: 45 litre NFT 8"inlet running total about 4 hours a day 8"Extraction constant on 20% Rating: 5