If in addition to the pool with sea water you no longer have significant requirements, then you can choose hotels in both Hurghada and Sinai.

• Sharm el Sheikh: Domina Prestige Coral Bay 5 *, Domina Hotel & Resort Oasis 5 *, Domina Hotel & Resort King's Lake 5 *, Domina Hotel & Resort Harem 5 *, Domina Hotel & Resort El Sultan 5 * ), Sea Magic Resort 5 *.
• Dahab: Le Meridien Dahab Resort 5 *.
• Taba: Hilton Taba Resort & Nelson Village 5 *.
• In Hurghada, and in the resorts next to it, pools with sea water are in hotels of different star: Princess Club 4 *, Princess Palace 4 *, Serenity Makadi Heights 5 *, Sunrise Le Jardin 4 *, Citadel Azur 5 *, Steigenbe rger Al Dau Beach 5 *, Club Azur 4 *. Or you can consider Sunny Days El Palacio 4 * - although the hotel does not have a pool with sea water, but its buildings are cunningly located around the shallow sea lagoon.

And in Egyptian Venice - El Gouna hotels do not need pools with sea water . Almost all of the hotels are surrounded by sea coves, because they are located on islands.

Of course this is not an entire list of hotels with similar pools, but it will give you some idea.