Hi I recently bought an existing tank its 32 inches long, 16 inches high, and 12 inches deep its is home to 4 corys 2 tetras and 4 rainbows I've tested the water daily and its settled into its new home fine and no abnormal readings I am however pondering ordering 4 african dwarf frogs for it and 6 silver tip tetras however on the same order I'm pondering combining postage for a friend and getting another 6 dwarf frogs and 6 t-barbs tho while a great idea in theory I'm now worried htis is going to kick my tank into a mini cycle and harm the inhabitants. Tho the tbarbs and 6 frogs wont be staying they would need to be in my tank a week before they go to their new homes .... am I right in thinking this is a bad idea and we should scrap the combining postage idea?