I just added a gallon of bottled drinking water to my fresh water aquarium yesterday morning and now this evening my aquaruim water is cloudy or milky looking. What happened?

Sounds like your tank water had a significantly different alkalinity and/or calcium content than the drinking water you added. This may cause a chemical reaction in the water that causes calcium carbonate to fall out of solution, turning your tank a milky color, as described. If this is the case, your tank sould return to normal after a few hours, with no adverse effects on your livestock. In some cases, you may want to use a commercially available water clarifier (such as Kent Pro-Clear) or run some type of micron filter on your tank for a short while if it doesn't seem to be clearing on its own. Top • My three month-old 10 gallon setup is doing well, but I can't get rid of what appear to be tiny bubbles or particles that are clouding up my tank. The fish seem healthy, and my water paramaters test as normal. If these truly are bubbles in your tank, they should dissipate when the system is left off for awhile. If this is the case, then make certain no air is beong drawn into the ...  more