it has been twenty some odd days since i had brought home my Planet Aquariums 75 gallon rimless tank from reef stock, and i am glad to say that it is finally running. it currently has 50 lbs of real reef rock, and 40 lbs of natures ocean sand. I am experimenting with a product by Red Sea called Reef Mature Pro kit. The kit contains two different kinds of beneficial bacteria, NO3-PO4X, and a calcium supplement to promote coraline algae growth. It says that my levels should be stable within 21 days, but i hope it is sooner than that. all of my fish from my old tank are crammed in my 29 gallon QT tank at the moment. i will keep you guys updated on how this product works to kick start the nitrogen cycle, and if it is worth the money.