I have a 29 gal
biocube saltwater tank. It finished cycling so I removed the shrimp, did a water change, and removed an inch of sand, as I had too much. My nitrates went from 5ppm to 15ppm. I guess because I disturbed things?? Anyway, a LFS
told me to leave my actinic lights on for 8 hrs while cycling and afterwards turn my daytime lights on for four hours the first week and increase 1 hour per week till I get to 7 hrs per day. I have nothing in there right now but my live sand, about 25 lbs of awesome very porous rock that was dry rock. I now have 2 inches of substrate in the tank. I have no corals yet either. Why do I need to run my lights? Is it to get the bacteria used to it? Can't find any help on this matter. Also, will my bacteria do fine without feeding it with invert / fish waste until I'm ready to slowly add things? BTW, will be putting purigen, chemi pure elite, and a new floss in Saturday which will be three days after I removed some sand. Hopefully that will help with my nitrates. Please help!