Aqua Flakes for moms

what should be the dosage for my BlueBerry's? i've been using 110ml for every 20gallons. and i've been changing weekly. now i'm having all the lower branches dying. could this be because of my light source (8 four foot t-8?) the 5gallon bucket only holds 2 gallons cause of the roots

nothing? i'm a newb that got thrown into this and could use a little help. am i lacking info? the ph is correct, i don't have a EC meter

If you are only using Aqua Flakes you should add the Algen extract and the Drip clean. Algen will add in vitamins and micronutrients while Drip clean will get the excess salts that are built up, out of there. If you are using R/O water, you should also add in a calcium-magnesium supplement……Peace and good luck