Nope. Without fish in he would not have to do anything. If you have lots of plants there is no need to add ammonia. You may choose to ask him to add fertiliser while you are gone. Once the plants have established and are actively growing you are safe to add fish.If I set up the tank now and added as many plants as I can, wouldn't my husband still have to do something while I am gone, like add additional ammonia, test the water, or do a water change once Nitrate levels rise?