Robertsanswered grow question 3 years ago The issue that your having spider is too much water and nutrition is too strong. Adding substrate like coco and course perlite to growing medium will improve resistance in future. Algae is not a issue. I believe the orginal issue might of been your ph in substrate, unless you watered daily. Can only do that in a coco grow. Kinda have to. Hopefully this is some insight. Nutrition wise always go half recommended to start. Then adjust. Also go off plant size not a chart. Slow growth and following a chart will lead to worse issues. So good luck and bummer about the