u/Feorag-ruadh

Hi everyone, I have a number of alocasias in semi hydro (wick system, soil ninja semihydro fine mix) and they are doing relatively well but they are showing yellowing leaf edges which I believe may point to a magnesium deficiency. I have read that ideal Ca:Mg is 4:1 for alocasias but I don't see many products suitable for semihydro that provide this? I currently use liquid gold leaf which is over 6:1 from memory. Does this mean that I will have to add extra calmag to the reservoir? Any advice would be much appreciated