Yeah, I know 9 times out of 10 it's gonna be co2 /light, but just wondered if anything else causes complete failure. Although I feel now I could have done more regards the light and co2 it to my mind was much improved on my first attempt in dragons crypt where the same lighting was used but co2 took me weeks to ramp up. this time i was achieving lime green dc for lights on and only running a 5hr photoperiod yet the plants have completely failed. Not just dropping leaves but stem and leaf turning to mush in week 2.
There are some survivors but it ain't pretty!
I'm running yellow dc at the minute with reduced lighting intensity, bit wary now about introducing livestock as ill have to turn down the co2 rate.....guess ill have to buy some brackets after all and hang the light high!
Cheerio
Ady