why i usually do is set the pH to be the same as the shrimp tank you bought it. let them adapt to the new environment with minimum pH shock. i usually set it to neutral or slightly lower. they breed really fast.. i am not using any filter, air pump, just place the tank outside with some sunlight. they love to eat algae..

one thing i really want to find out from the experts here, are shrimps like guppies? i mean once the females carry eggs, they continue that for few times even without mating with males?