So I started some greenhouse feminised white rhino from seeds about 4 weeks ago and also some seeds from bags I bought.. I have them all in a recirculating dwc 5 gallon system. My problem now is the seed I found in the bags starting to turn yellow and leaves are starting to get crispy.. The white rhinos all seem healthy but I see them starting to turn yellow and leaves starting to bend. I wanna fix this problem before it get's any worse. My light is 1000watt dimmable and was set at 750watt about 18in over the plants. I was not sure if the light was to close so I moved it to 24 inches but the problem is still continuing. Then I did a complete res change and set my nutes and ph to 315ppm and 5.7ph. Before then change it was 375ppm 5.7ph.. Im following the lucas formula micro, bloom and im using the .5 conversion. So it says for veg 0-5-10=592 ppm. Im doing half that 1 month into veg so I don' think nute burn is the case. Any help is appreciated, this is my first grow so the more info the better. My phone screen is broken so I cant get pics up right now but I will once a friend comes by.