the water in my fish tank is always murky

i have a 55 gallon tank with the right filter and expensive filter so i know its not that i have a pocostamos so its helps keep the tank clean i just emptied the water out and the glass on the inside came off blue onto my rags that i cleand with the rocks in my tank are also blue can anyone suggest away to clean the rocks to keep them from dirtying up my tank. Remember the rocks have a substance on them to keep the tank clean so bleach i dont think will work i need to know a way to clean the rocks with out it eating all the stuff off the rocks

The stuff that lives on your rocks is essential in keeping your tank healthy. Beneficial bacteria digests fish waste (ammonia) and converts it into nitrites. Other bacteria converts nitrites into less harmful nitrates. This cycle tanks time to develop and your mucking with the tank just sickens the fish. Be a bit more patient and it will develop. Feed a lot less food, and change 25% of the water weekly (use a gravel vacuum) and make sure the temp of the new water is the same as the tank. You don't want to destroy too many of the beneficial bacteria when you do a water change and changing too much water or having it at the wrong temp stresses them. Also, your filter media has a lot of the bacteria growing on it. Don't change it too often (and never at the same time as a water change). When it start becoming clogged, rinse it out in cool tap water. Only change it when rinsing no longer is effective.