It doesn't look like you're listening icey, your tank is too small for the loaches, you need to return them. You also should NOT add any more fish until your tank is FULLY cycled, otherwise you'll just be killing them off. Do NOT mess with your PH. Was the first picture of a fish in your tank or not? If you do have an angel fish in there, you need to return that too as your tank is too small.
As a word of caution, fish store employees give notoriously bad advice, I wouldn't listen to them, they'll just try to sell you more fish and products.