I just start a new fish only saltwater tank . Last year Nov start finish cycle on early Jan 5 fish already in . My tank is 3 feet iOS tall tank I have done 1 time wc . I start my tank using tap plus prime and safe . And a 3 pack of sea water buy from Ah Beng . Last wc Feb . Do I need a skimmer? Do I need to wc weekly ? I only want fish only coz my tank no chiller . Sent from my iPhone using Tapatalk