JBL AquaCristal UV-C: Does the ultraviolet light destroy active ingredients of my aquatic plant fertiliser?
UVC light degrades the chelators in the fertilizers, which prevent the precipitation of trace elements such as iron, among others. Therefore, when using a UVC water clarifier, it is advisable to change over to daily fertilisation. The standard dose needs to be converted into a daily dose at the beginning. It may also be necessary to increase the fertiliser dose slightly. Iron should be detectable in traces at least prior to each subsequent application of fertiliser. Vitamins and other higher grade organic compounds may likewise be broken down. Therefore, when using vitamins, it is advisable to add the fertilizer with the food twice a week.