Nft hydro

Flushing now for 3 weeks with fresh water only. Seen significant bud growth this week. Got some sort of deficiency on one plant I believe to be calcium. Just riding it out with the flush hopefully turns out ok. Was having trouble keeping the plants up straight on the 4 inch rockwool cubes. Temps were getting little high and humidity under control. Very little smell at all not sure if it's a positive or negative. They look very messy at the moment from.the HST but it's definitely worked out so far. Biggest plants are the back ones which probably shouldn't be the case with nft. Thinking they got better light exposure than the front.