Cultilene Smart Root Zone Management
Thanks for using Cultilene SRZM!
A disclaimer applies to the content and use of Cultilene SRZM App. By using Cultilene SRZM App you accept this disclaimer.
What you see is most likely precipitated calcium phosphate and calcium sulphate which is not nice to see, but it is not harmful to the roots. Drip solutions in substrates can precipitate more easily in the following conditions:
One or more of the mentioned conditions can cause precipitation. This is less of a problem at companies who always have large drain percentages and good pH control.
The precipitation will not go back into solution quickly, or not at all in the slab, so there is no danger that this will cause a nutrient imbalance in the rooting zone.