I dont know dude, looks like calcium deficiency if you look at grow guides and books. If your water is low or high in calcium that would futher help nail it down, do you know the ppm of the water? Biobizz is low in calcium though, i not used their foliar but is advertised for fixing calcium deficiencies quick, there alga mic is just a seaweed supplement and i'll tell you about how good their fish mix is as i get that tomorrow. Im also getting a cal/mag supplement tomorrow as i have soft water so cal and mag has been a problem with biobizz and probably any other totally certified organic nutes.
That said i hate grow books and cant work of them deficiency charts, i got a chart for cal/mag but it dosent look very similar yet, calcium gets worse quick and derops yellow bottom leaves differently to nitrogen def.
Im with max though, definatly looks deficient or over done, as its biobizz im just picking on them cause they lack calcium big time and magnesium. I couldnt call that, looks mild at the moment. Peace