Ok let me start from the beginning. I bought a tank from someone that was already up and running with no fish. Just live rock. It's a 75g, t5 lights, CPR backpak and marine land canister filter. We left a lil water over the sand to transport it back to my place. Well when I got it home I filled it back up, cleaned everything and let it do its thing for 2 weeks. Well I tested the water everyday and was told that I could add fish. Well I added five damsels and now the sick with ick and the nitrates are high and this brown algae is taking over! What to do??