Not really. One method of curing this is to use plastic sheet covers; this is an easy solution if you are having an algae problem. The coco coir rolls work great in trays. The coir mats are reusable if you clean them. If you are worried about the algae right now just relax, it does not usually create a huge problem; but if you want to clean it immediately, use a tablespoon of 35% hydrogen peroxide in a gallon of water. Fill a spray bottle with the solution and spray the tray (it’s fine if the plants are in it).