I have a 100 gallon saltwater fish tank. Been having problems with the ammonia, nitrite, nitrates and PH. So went to war. I did a 20 percent water change. I add cycle everyday and put in a Sea-Lab block No. 28 as needed. A week has passed by run the test again and find out that the test that is still high is the Nitrate. Call the pet store where I do business and they tell me to check my protein skimmer. The protein skimmer is not producing the thick bubbles that in turn will produce the brown waste in the cup. The bubbles are very fine and they do not produced anything as far as waste in the collection cup of the protein skimmer. The brand of the protein skimmer is a Bubble-Manus. I went ahead and purchase at Smart Pet a chemical called Prime by Seachem. It claims it removes Chlorine, Chloramine, Ammonia, Detoxifies Nitrite and Nitrate and added a double dose for the time being. Have 1 blue velvet damsel and 2 dominoes damsels and they seem to be eating well and doing well. Any suggestions will be greatly appreciated. Thank You