2nd week of flowering, leaves turning yellow from bottom up.

Plants are in 2nd week of flowering. Extreme yellowing and wilting from bottom leaves up. Using PureBlend ProBloom and Liquid KoolBLoom. PPMs around 1200 ph around 5.5. What do I do???

im not sure how soon but when you go into flowering the leaves will go yellow from bottom up expect your whole plant to be like that when you harvest