Well my friends daughter came over to help make cupcakes for the holiday. We had the food coloring out and she thought it would make the fish tank water pretty if she dyed it blue. Thankfully no fish were in the 1.5 gallon carbon filterd tank. Could i use a bit of ( as in a few drops) of bleach or should i let the filter hopefully clean it or do i just change the water? I am not getting fish until christmas so hopefully it will be ready to go by then. Thanks for your help!!