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i have currently set up a intelligent watering system flood and drain and am growing in clay pebbles for the first time. i have set the ph in my water butt at 5.2 but when the system is flooded, i check the ph in the pots and it reads 6.2. should i ajust the ph in my butt to 4.2, as the reading...

http://www.iwssystems.co.uk/howitworks_flood.html this is the system i have.

finally took the plunge and gone hydro after growing in soil for 2 years and purchsed a iws flood and drain system. just wanted to know if anyone else has one of these and what they think of them and how many times to water in 18 hour veg. i am growing in clay pebbles and started out with cuttings.

mine are from cuttings mate not seed, what are you growing in, this is the first time in hydro for me with a iws flood and drain system with clay pebbles. when i grew in soil i had 18 plants in veg for 4 weeks and flower for between 7 and 8 weeks under 5 600 watt lights and never had any major...

will try and get some pics up, yeh they are all the same strain, its amazing how quick the plants droop after the 14 hours of light, you can see it happening before your eyes and takes about half hour. i am feeding canna nutes by the way.

thanks for your replys by the way, much appreciated.

the temps are at between 74 and 78. thinking of leaving 2lights on tomorrow with the humidifiers on to get the humidity up a bit more and see what happens. i am currently flooding the system 3 times a day, is this enough.

the humidity was a bit on the low side, betwen 35 and 45%, so i have 2 humidifiers running constant and even turned one light off after 12 hours which got it up to 60% but this still didnt help the problem. any ides what else i could do and will the leaves drooping after 14 hours cause any...

Been growing in soil for a few years now but decided to go hydro and bought a flood and drain is system. 18 plants are grown in clay pebbles under 4 600watt lights. feed is at 12 and PH is kept at 5.6 rising no higher than 6. plants are now 4 weeks in veg and 13 of them are 18inch tall and look...