Yes, it's a pool for swimming and not for fish. It's more of a small dipping pool rather than
one where you can swim laps. It was designed to look natural with the waterfall and boulders around the edge and a pebble like bottom to simulate a creek or river bottom. It uses a chlorinating / salt system to prevent algae from forming. Not really "salty" to swimmers (the salt level is pretty low), but very effective to chlorinate the water without having to buy chlorine making it very inexpensive to operate.