i dont understand why you are messing about with the tank

, you dont need "instant bacteria" you need to keep testing and doing more regular water changes ( once a week as long as your ammonia and nitrite stay at 0) rubbish like that stuff is only any good when its refrigarated from time of manufacturing till you buy it, which often dosent happen as its too costly for some stores to do, so what your buying is a big bottle of "nothing" probably wont do any harm but not doing any good either,and stinging your pocket!
test your water twice a day for a week once in the morning and then again in the evening, carry out water changes accordingly and things will soon get back on track for you ( any slight rise in ammona and nitrite then water change) the dog wont mind waiting a while
i suggest you use lay some kitchen paper on the surface of the tank, see if that will absorb it, if not then you should do a water change

and Dont add anything else, you dont need too! you just need to take the advice on offer

shelagh xxx