fairly new to the reef system compare to the veteran reefers on this forum, but so far i have been able to keep all of my corals and livestock happy. here's the thing that's bothering me, i have almost 40x turn over ratio in my regular 29gal tank setup by using 4 Koralias-two opposing each other and two on each side of the tank facing front of the glass. anyways, i see brown stuffs on my rocks and crevices between the rocks and whenever i brush these detritus i would create a detritus storm in my tank. i'm not sure if this is normal. if not, can someone tell me how to deal with it? if this is normal, i find it very hard to add more powerheads into my tank without sacrificing the limited space i have. i have seen some of the most beautiful tanks using just two powerheads mounted on each side of the tank and i'm wondering if i'm doing something wrong. i'm using a toothbrush to brush the liverock and what-not every week and i'm looking to see if that's normal. i do run the powerhead 24/7 and my skimmer (Reef Octopus BH1000) 9hrs a day (only 9hrs because it's in sync with my timer for the light as well as the fact that the tank is in my room and i'm a light sleeper)