My 10g has been running for about 2.5 months and seems to be running smoothly. I have 1x96w (50/50 compact) lights. I know it is alot but the purpose for this tank is to influence coral blooms so that i can put them in my 120g which seems to be having a problem in encouraging corals to replicate. I was wondering how often i should be doing a water change on my 10g and also on my 120g? also my 120g currently has a 29g sump wet dry and i was thinking about starting a refugium and would like some feed back and/or on that starting that project....any advice will help thanks