So I am going to start my tank this month and what is the most important equipment to have in the beginning? I want to have a heater, powerhead, skimmer, salinity refractometer, and of course lights prepared once I start cycling. This will be a nano tank (29g Biocube) by the way, and what brand of skimmer have you guys used or recommend? Also this is what I was planning on getting: Jager Thermostat Heater, MP10 powerhead, Eshopps PSK-100 HOB Protein Skimmer, and Dimmable Full Spectrum 120W LED. Are these alright choices? They're pretty expensive but oh well, are there any very good skimmers or powerheads that are a bit cheaper but still work nicely? Also last question, I've been watching videos and everybody is like, "Yeah I have a blabla reactor and it's great" after like an hour of research I still have no F-ing idea what a Reactor is/does someone please explain! Thank you.