accessories

Does anyone know of a product that you can hook to your skimmer to use as a removable main drain,it would have been easier if I installed it beforehand,but now that I haven't I would like something to throw in the pool while not in use or for when I'm sweeping the pool to help filter the finer...

My swimming pool was built in the 1970s old but in great shape. The diving board is the issue it’s an old fiberglass one the box is fiberglass and it’s cracked. It has 4 studs. I want a diving board that works. Is there anyway it’s still made or if I could one that’s compatible or aftermarket?