Could be the re-used coco also... although it should last for a year with proper care.

I'd still suggest to take another look at your watering schedule. Coco is coco, and has different properties than soil. It's more like hydro, and should be treated as such. You can always try different watering schedules for different plants and see how that works out for you. I've been researching coco for a while now, and it seems that watering daily is the norm, sometimes you can water once every two days, and sometimes it's twice a day, depending on plant and container sizes. Even if you have previously been successful, there's always room for improvement, right?

Also remember to rinse out your new coco well before using it.

Here's an interesting read on coco...Growing on Coco: Busting the Myth - International Cannagraphic Magazine Forums

There's a lot of other good information in that section.

Good luck :thumbsup: