Hi all,
I seem to have some deficiencies developing.. I'm using an all in one ei mix with nitrates at 25ppm, potassium 30ppm, phosphate 8ppm, magnesium 10ppm, iron 0.5 ppm (mix of buffers as my water has a GH of 9.8). Made with acidified DI water one litre lasts two weeks.
Other thoughts, this...