hello fellow growers. im having 2 issues with 2 different plants and need your help identifyng them and hopefully ways to counter them . i will post 2 fotos . any help is greatly appreciated . thank you in advance

this plant was going perfectly ok but lately all the leaves are starting to go pale and yellowing from the inside to the outside of the leaves. just entered 4th week of flower. its an auto growing in soil .

this is a different plant and something i noticed the past 2 days . anyone knows what im dealing with ?
thank you so much all