My tank has been cycled over 6 days. So far the mangroves started coming out with leaves. I added a single head dosing pump to add fresh water( may be Kalk in the future). My ebay LED arrived but I am kind of disappointed. The intensity is not that good. I might upgrade that to a single par 30 bulb if needed. This will be after I add the coral. I have not measure the water parameter yet and I try not to. Reason being only with 4 gallons, any change in external condition will change the water parameter quickly. I only rely on the mangroves and the live rock to perform all the filtering. With occassional water change, I believe this will keep most coral alive. My only concern is the heat, temp swing is the most I worry but I will see if the fan can keep the water temp to a minimal swing.