I can't manage to make it past a week. My seedlings start to lean and grow brownish reddish stems, any idea what I'm doing wrong
Here's what you need to post to get quality help on your grow.
(1) Give images under metal halide, cfl or incandescent (no hps).
(2) Give complete synopsis in one post telling us all the details.
(a) substrate
(b) nutrients
(c) additives
(d) age
(e) strain
(f) environment (specifics on temperature swings, images of habitat, ducting, humdity, etc...)
(g) miscellaneous
Now you will have a chance of getting meaningful support because most people here would like to help you. Unfortunately without this info all we are doing is guessing. If you decide to use the wrong guess you may end up potless.