I have a problem with the edges of the leaves of my plants getting soggy then brittle then yellow then dieing. I've tried flushing them cutting watering down to once a week but nothing seems to work. Here are some pictures of the affected leaves.
Well I barely water them now :/ and I will consider adding a lot more perlite next grow. There is one computer fan that lets in new air. So what should I do to help my plants?