ive had a saltwater tank for about 3 years. I recently had some deaths in the fish family. I work alot and i was trying to get rid of the fish so they could have a better more attentive mother. However, that didn't work out. I love my tank i was thinking of converting to a fresh water. I have a pond outside and the fish seem to be doing well out there. i have all the saltwater stuff sand. heater, pump filter. I now i need to clean the tank with vinegar. Im not sure how to start off. any advice would be great thanks.