Waiting until week 4 to start adding nutrients to prevent nutrient burn. The co2 bucket we hung in our grow last week ended up being a cunt hair short of a disaster! 2 days after we installed it, we noticed a whit film building up on the bucket, and our plant buckets! there was so much of this weird residue! Thank god as soon as we removed the bucket the problem ceased! Buying some exhale bags tomorrow!