"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
דבר דבר (Dabair Davar): Sometimes It's Possible to Have the Problem of דבר דבר (Dabair Davar) and ממצוא חפציך (Mimtzo Cheftzecha) in the Same...
Other Things One Can Do When There Is Water on the Roof of a Sukkah;
is one allowed to add to an existing structure;