Canna Mono Ca15% Calcium Nutrient for treating calcium deficiencies.
Please be aware that in almost all situations a calcium deficiency is a symptom of a more general deficiency in all elements caused most likely by inproper mixing of your base nutrients. Before resorting to using 1L Canna Mono Ca15% Calcium attempt mixing a fresh batch of nutrient ensuring correct levels are attained, ideally by checking with a suitable EC metre. This may fix your problem, wheras using 1L Canna Mono Ca15% Calcium could make it worse.