I have had my tank for a little over 2 month. I waited 2 weeks before putting any fish in. I also have one small live plant a 1 moss ball. I have to small rainbow sharks, 6 tiger barbs, 2 gourami fish. 1 Angel fish. This tank is a 65 gallon tank. I have been struggling lately with no clear water. Goes cloudy then a week or so after that goes clear. Then seems to repeat and goes cloudy again after 3-5 of clear water. I am new at this freshwater tank. I am sure I am doing something wrong. When I take my samples to Petsmart to test, some times they tell me to buy ammonia lock and to use weekly. Some tell me water changes, others tell me do nothing and its part of the water cycle. Can you get some true feedback/guidance from people that know what they are doing? How often should I be changing water, what do I add as far as chemicals go with and w/o water changed ect.