STAYING ON WITH THE SUBJECT OF IS IT SAFE, I HAVE A QUESTION ON WATER CHANGING AND WONDERING HOW SAFE IS IT TO TAKE WATER DIRECTLY FROM THE TAP MIXING THE HOT WITH THE COLD TO GET THE SAME TEMPERATURE OF THE TANK WITH THE FISH THAT THE WATER WAS REMOVED FROM, ADDING SOME PRIME TO DECHOLRINATE AND PLACE IT RIGHT INTO THE TANK. MY FEAR OF DOING SUCH A CHANGE IS THAT I FEEL THAT THERE MAY BE SOME MINERAL DEPOSITS IN THE HOT WATER TANKS THAT WILL BE TRANFERRED TO THE AQUARIUM. AND YET I KNOW OF BREEDERS THAT DO EXACTLY THAT.