My online retailer is keeping their fishes at 1.018 salinity level and they will be shipped overnight from West Coast to East Coast. I don't want to drip acclimate to avoid ammonia shock. Will it kill the fishes to go from 1.018 to 1.024? If I raised it over time, how long do you think is safe to raise the salinity up to 1.024? Much appreciated. (A pair of clownfish and a dwarf angelfish are being purchased).