I'm getting ready to set up my new 220.6 today and am going to be using Dr. Tim's to kick off the cycle. Here's my question - I'll be out of town for a few days next week and don't want to ask someone else to do the testing & adding while I'm gone. Will it do any harm to add the water and rock and all that now and then start the fish-less cycle when I get back? It will be about a week total.