I am using NFT and i started using flush liquid last wensday, it says to flush for 7-10 days, i was planning to harvest tommorow (wensday). All of the top buds look really nice and ripe but the bottom ones are all quite small and have no red hairs. if i was going to chop down the top and leave the bottom growing then what would i do about the nutrient situation because they are all in flush?