Hi well I wanted to know and get advice in how i can convert my 20gal FW to a SW i just romoved my fish and placed them in a smaller tank but i want to convert it to a saltwater tank what can i do to clean the FW tank what do i use? and well any advice in what i should do for this new tank i am going to start building a stand with canapy for this 20gal and i'm not sure if i shuld make it a reef tank or marine tank i already have a reef tank but with a 20gal i'm pritty much out of the idea of running a marine tank. what can i do and what should i do please i'm open t*thumbsups o any ideas. thank you in advance