Noob first time grow

i harvested the top part of my grapefruit plant as i checked the trychones and they were 20% amber the lower half had mostly cloudy but no amber ro im going to give it a last feed then flush in about 5 days for 7 days should bd ok then .. Ive raised thr grapefruit off the ground to stop fluids mixing between them as one gonna have a few more feeds where the other is on flush My other plant the bushy banana blaze is foing ok had a good 2-3 weeks i rekkon till i even think about harvest