My nitrate levels are high, around 100 ppm. About 2 weeks ago I had to change tanks because of my glass tank leaking so I purchased a 125 acrylic. I saved all my water, live rock from my old tank and put it in my new tank. I bought 100 pounds of live sand and put it in the new tank. The new tank has an overflow, which was filled with bio balls to the top. I took all those out yesterday because as I understand now bio balls are not good. All that is in my overflow now is a bag of carbon, probably about 2 cups. The tank has a sump, which I have a protein skimmer in, some live rock, filter pads, and some bio balls. Should I remove these bio balls as well? I also bought 2 bags of the beneficial algae and have it floating iny sump with lights on it 8 hrs a day. I just did a 25 gallon water change yesterday, and I got the water from an aquarium store. I thought I would see a change in my nitrate levels today, but not really much. What should I do? I'm worries my new soft corals are going to die! Please help!!!!