Leaves, stains, or milky colour? Signs it's renovation time
A pool that won't come clean no matter what you throw at it is usually telling you about its surface, not your chemicals.

If your pool is constantly stained, goes milky no matter how you dose it, or feels rough underfoot, the problem usually isn't your chemicals — it's the surface they're sitting on.
An old surface holds stains, harbours algae, and soaks up chemicals without ever quite coming right. Once it's sanded back, repaired, and sealed with three coats of marine-grade epoxy, the water is easier to balance, cheaper to run, and the pool looks like new again.
A repaint costs a fraction of a new pool, and it comes with a 2-year workmanship warranty. Send me a photo of your pool and I'll give you a straight answer on whether it's time.