Hi all, I am a newbie to reef aquariums and have tested my aquarium and PH, Nitrite and Ammonium are ok. Nitrate is off the scale, however. I have done a couple of 30% water changes and it has come down a little. I am not over feeding as I hand feed and take out any uneaten food. I have a little bit of algae on the back panel but it is not growing or out of control. I have ordered some nitrate test strips as i think the test kit may be giving an incorrect reading but it still suggests that there is too much nitrate I have about 15kg of living rock in a 95 litre tank. The filter system has plenty of noodles and EHFI Substrat sintered glass. As it is only a new tank I only have one minstrel pufferfish, one Lionfish and one stone fish. I also have one hard red coral with a symbiotic red crab which lives inside it. :question: How can you reduce Nitrate apart from partial water changes?