Some people use very little nutes like the Lucas Formula which only has Floramicro and Florabloom. My res water is dark too but I add a few other nutes than just Floragrow, FLoramicro, and florabloomMakes no sense how you can see roots. My solution is black
Same here the Floralicious plus is a organic based nute so anything organic will make your res dark .my solution looks like oil. the b1 thrive.. is black . guano i use is dark.. seaweed is thick and dark