I was thinking of doing a big water change. I changed out 3 gallons yesterday and the test results didn't change much. Of course thats only a little over 10% water change so I'm not suprised. I have enough salt water to do another 5 gallons worth of a water change. Will that be enough to cause any change in the water test results? So far the tank is sitting at 8.2 as the pH, 0 ammonia, .25 nitrite and 20 nitrate. Those were my test results. I had a different guy at the LFS test my water and he said my pH was good at 8.2, 0 ammonia, 0 nitrite, and 20 nitrate, so either my nitrites are off or his are, but thats what will decide if the tank is cycled or not. He says the tank is cycled and the tank has been running for over 3 weeks now. We are having a major algae bloom and were advised to keep the amount of time the light is on to a minimum to get the algae to die off. When I asked if he thought the tank was cycled he said it was cycled. I then asked when he would advise putting corals or inverts in and he said give it a few more days to sit.
So what do you think? Should I do a 5g water change, re-test and see where I'm at? Trust the guy at the fish store?